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Posts Tagged ‘christianity’

Did you know that there are Secrets in the Bible still being Discovered?

Posted by jdbsound on July 17, 2020

What does God say about modern church design?

What is the best sounding church for worship?

What is the best balance for speech, music and congregational singing?

Does the quality of the acoustics and sound system at your church honor God or Man?

The battle for a person’s soul is a constant war on many levels. The people involved are ministers, preachers, scholars, experts, archeologists, historians, prayer warriors, educators, and ordinary Christian people who provide different ways of bringing the message of salvation through Jesus Christ. The tools we have are Bibles, books, reading materials, colleges, universities, missions, donations, churches, multimedia, sound systems, and more.

Christians are taught in the sufficiency of scriptures. Many believe that the Bible is the inspired word of God and never question it. Some of the knowledge in the Bible is still teaching us today. It is only now that we are learning how relevant it is for all Christians and Jews.

Since the beginning of when Jews, and later Christians, started to build larger spaces for teaching and worship, most projects would run into common problems. These problems have been like a plague for Synagogues and Churches alike. The solutions to those issues seem elusive or beyond reach and yet the remedies to most of those issues have always been in the Bible.

For the rest of this article,   Bible secrets in the open

By Joseph De Buglio

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What costs more? Drum Booth or Fixing a Sanctuary?

Posted by jdbsound on June 10, 2020

What costs more?  Or, what will give you the most bang for the buck?  Did you know that for less than the cost of a fully enclosed drum booth, you can fix all of the acoustical issues of a typical sanctuary?

Here is a typical drum booth churches are buying.  This booth retails for $4,300.00 and is often on sale for $3,000.00 plus shipping.

Here are all of the sound problems the drum booth solved. Keeps the drums out of the mix and the people in the front of the church have less noise from the drum kit. The downside to all of this is that often, the drummer plays louder which leads to many getting tennis elbow, and hearing damage often occurs.  There is one extra cost to include.  Often drummers need headsets or floor monitors to hear everyone else on stage.  What is often overlooked is that churches should have the drummer sign a liability waiver that the drummer will not sue the church for premature hearing loss and permanent damage to their arms due to tennis elbow.  Drummers often have to play louder in order to hear themselves inside a drum booth or shield.

 

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Here is an example of a modest church that decided to fix the worship space instead of getting a drum shield or booth.  The material costs including the paint were $1,000.00.  Three people over 3 Saturdays completed the installation.  If you look carefully at the photo below, six months later, and there is no drum booth around the drummer.  They don’t need one anymore.

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The following is a list of the planned sound issues solved:

  1. No more standing waves
  2. No more deadspots or hotspots
  3. Eliminate flutter echoes often heard off the back walls on stage.
  4. No more excessive bass

Bonus fixes included and no extra cost:

  1. Better speech intelligibility
  2.  Increases the signal to noise ratio to 21dB throughout the room
  3. Most of the floor monitor spill was gone
  4. Less sound system distortion
  5. No more bass distortion
  6. Equalized the room to remove excess energy at 400 Hertz -20dB
  7. Went from 18 inches to 38 inches of before feedback,
  8. The room is +/- 1.5dB throughout the room
  9. Makes the room easier for the musicians to perform
  10. Improved sound for people with hearing aids
  11. Before about 15% of the congregation was singing, now its around 60% after 4 months
  12. The sound team is having an easier time mixing.
  13. No drum shield of any kind
  14. Drummers are playing quieter without being asked to.
  15. The drummer can hear everyone on stage with minimum floor monitor support
  16. The pastor is less fatigued after preaching
  17. No more sound complaints if the sound is too loud
  18. The sound system sounds so much better
  19. The bass from the sound system is much more dynamic
  20. The bass from the bass guitar is cleaner and not overpowering any of the other instruments

These are all of the comments various church members, musicians, and the sound team shared after the first 4 months of the acoustical changes.  All they were hoping for was less bass drowning out everyone on stage, to eliminate hotspots and deadspots in the audience area and on stage, and to stop the loud reflections off the back wall affecting the musicians and the pastor when preaching.  The diffusers gave them 23 improvements instead of just three of them.  There is no other custom or “off the shelf” acoustical system that can do all of that in one step unless you have unlimited cash at 30 times the cost.

Drum Shield or Fixing a worship space.  For the cost of a drum booth, you can fix a church up to 800 seating with some sweat equity.

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What happens when Church Architecture, Technology, Science, and meets up with the Bible.

Posted by jdbsound on April 24, 2020

The Bible has a lot to say about how a modern church should be designed.  Solomon’s Temple was not just a house for God to dwell in, it was also meant to be a tool to help preach and spread the Gospel in the present.

After reading this article, please pass it on and make comments below.

***  Article: Gods Authority in Church Design ***

This article is the most comprehensive study of King Solomon’s Temple I have ever written.  If you believe John 1:3, then you know who really designed Solomon’s Temple.  King David only penned the details of the new temple.  King David told his son Solomon that it was the hand of God that guided his hand.  What was so important for God to design the temple rather than letting a man design in with whatever came into his thought?

This article gives a stronger case for what the “Inspired Word of God” means.

Winning people to Christ is not a game or something given to chance.  We need all the tools possible to have an impact on this world.  Jesus is Lord, and if your church is dedicated to God, Jesus is Lord over your church building too.

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Article Published in Church Sound Magazine

Posted by jdbsound on March 30, 2020

Late last year, Kevin Young, freelance music and tech writer, professional musician, and composer ask to write up a profile article on JdB Sound Acoustics.  After several interviews, he submitting the article to Church Sound Magazine which is part of Pro Sound Web.  Pro Sound Web has published a number of my projects over the years and they are a great resource for churches for all things about church sound, lighting, and AV.

Removing Barriers: The Motivations Of Long-Time Worship Acoustics & Systems Designer Joseph De Buglio

Post below any comments, questions about the article or about church sound in general.

Link to a PDF version of the article. Removing Barriers

Thank you.

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How to Improve/Fix Congregational Singing Permanently

Posted by jdbsound on March 6, 2020

Congregational singing is perhaps the third most important part of worship.  Prayer and preaching of the Gospel come first and second.  In many church publications and websites, there are many articles about how to improve congregational singing.  When you say improve congregational singing, what are you truly asking for?  In almost every case, they are asking how to get more people singing.  And the theory is, the more people sing, the more they will be engaged. 

Here are some of those titles. 

  • 7 Tips To Encourage Singing in Your Church – Gavin Adams
  • Nine Reasons People Aren’t Singing in Worship
  • 12 Things to Avoid for Better Congregational Singing
  • Fifty Ways to Guarantee Poor Congregational Singing
  • How to improve congregational singing: 4 suggestions to …
  • A Simple Way to Improve Congregational Singing: Get Rid of the Carpet

There are many more.

The ideas recommended are extraordinary, and most of the time, they are putting the bulk of the blame on the church leaders, including the pastors and song leaders, this is so wrong.  The truth is, all of the recommendations outlined are the result, such as trying to put a square peg into a round hole.  There is a simple solution to all of this.  When you read the articles, what church leaders are doing is a direct result of compensating for poor acoustical conditions.  Choosing the right keys to sing in, choosing a better selection of songs, hiring professional singers, and performers, in the end, it only helps things slightly.  The thing is, what the audience keeps telling me is that when they are singing, they feel like they are singing alone, it creates a sense of loneliness.  People feel as if no matter how loud they were singing, their efforts have no contribution to the overall volume of the congregation.  When you can’t even hear yourself, most people just give up and don’t bother singing.  Some may just mouth the words.

Sure, there are times when we see people at a concert singing a particular song, and it sounds impressive, but the reality is, those people will not sing the whole show at that volume.  It is more about having an emotional high and nothing more.  It is doing something to capture a moment for personal gratification and bragging rights.  That is not worshiping in any sense of the word.

My take on how to get the congregation to sing is by first identifying the source of why people don’t sing in your church.  In 90% of the churches that I have helped solve their congregational singing issue, it has always been around one reason – acoustics.  Here is some background you should know.

This is a new church with diffusers built into the walls. The quality of this room is such that when this photo was taken, the congregation drowned out the Pipe Organ. The organist said he pulled all the stops and he could not hear the organ for some of the songs they sang. At one point he stopped playing. With a sound meter recorder at the pulpit, the congregation hit 105dB several times and no one complained that it was too loud.

The struggles of congregational singing started long before the sound system was invented.  It is my belief that Choirs were formed originally, because when Christians first started to worship in existing pagan temples, (after the edict of tolerance,) most likely, those temples had such poor acoustics that the congregations back then had the same problem of not hearing themselves.  Then some talented singers found that if they stood in a particular part of a room, they could hear themselves and create an awesome sound of choral singing within the pagan temple.  That talent was later included as part of the worship.  When Christians started to build churches, when the buildings were finished, they asked the better singers to go to the part of the worship space where their voices were effective in creating this big sound where a few people would sound like many.

In the end, as more and more churches were built, the choir became the focus of congregational singing, and even though the congregation was encouraged to sing, the choir was the focus, not the congregation.  This continued throughout church history in one form or another.  Sure, some large cathedrals have these amazing sound effects. (Sound effects do not support congregational singing or speech.) Still, in the end, it is the choir and the organ that dominated worship, not authentic worship singing or hearing the Gospel.

Throughout the Reformation period to today, churches have been experimenting with worship space designs to discover the Rosetta stone of church acoustics.  Churches have been trying to create a worship space without any acoustical planning.  It hasn’t happened yet that we know of and if there is a church out there that works, where is it?  Why would it be kept as a secret?    When the room helps the singing of the congregation, the congregation will sing, and they will sing as loud as they are inspired to.  The same properties that makes congregational singing work, speech will be equally as good.  Around the world if there are such churches that have the proper balance of sound, for speech and congregational singing, why has no one documented these jewels or studied them to see what makes those churches better than others.  No one has made permanent records for future churches to follow. 

It seems that when a church gets known for its musical performance quality, it usually suffers from speech, and for years people have been brainwashed into believing that you can’t have a worship space that is good for both speech and music.  That comment is true, for a musical performance space or concert hall.  This is not what a church needs. A church needs a room to support congregational singing, not musical performances. 

When I get hired to fix a church, one comment that is repeated often is, we can’t afford or don’t want a concert hall.  That is the whole point.  You don’t want a concert hall, and it would be detrimental to a church to have such a space.  Concert halls do not support congregational singing, none of them do.  Concert halls are awful for speech.  If you look at most concert halls today, when it comes to speech, they close curtains, expose absorption panels, and they rely on costly sound systems to broadcast speech events.  Concert halls are either-or spaces.  They cannot support speech and music equally.  Furthermore, they don’t support audience singing at all.  How do I know that?   When I go to most of the churches that I have fixed in the past, when the attendance is around 90%, the congregation can drown out the pipe organ, the electronic organ, and the amplified worship team.  Yes, it is possible for the congregation to drown out a sound system with professional Christian performers leading the music.  That is what good acoustics can do in a worship space.  When people try to sing like that in a concert hall, it sounds like chanting in a sporting event.  It is not very musical and singing in four part harmony is out of the question.  In a worship space, a well-motivated congregation can sing over 105dB with the sound system off when the acoustics are managed for congregational singing.  If only the sound system could perform that loud without distortion and without the congregation complaining about the loudness.

Consider this, the invention of the sound system and its introduction into churches merely ushered in over time, the ability for contemporary worship, with the goal to get more people singing.  Yes, many churches tried amplifying the choir as a means to get the congregation to sing, it didn’t work.  When it came time for speaking, the sound system failed as well to amplify speech properly without feedback – This created a dilemma.  To make the sound system perform better for speech, churches add absorptive flat panels, and that usually means killing the room, which in turn, discourages singing.  The sound system was believed to be the solution to improving worship, but the truth is, the sound system can only amplify what the room allows.  In this struggle between the sound system and church worship, no one looks at the room as being the limiting factor.  Instead, observers and people asking whomever as to what can be done, the fingers point to the technology, the pastor, the song leader, and the soundmen who get all the blame.  All of the other recommendations are meaningless until the room is fixed.

The only complaint this church has is that congregational singing is much louder up front.

As I mentioned earlier, I fix the sound in churches all over the world.  Without changing the leadership, the pastor or song leaders, and without changing how worship is conducted, with the methods I use, most congregations go from 10 to 30% of the audience singing to 65 to 90% of the audience singing when the room is fixed.  That happens because there is a way to make the room very responsive to exactly what people need to hear and feel during the singing portion of worship.  At the same time, the same system improves the quality of speech, and as a bonus, the performance of the sound system increases substantially more.  Doing church acoustics correctly, is being able to have a room that does both speech and congregational singing equally well.  It also winds up being a good room for Christian concert and drama performances.  Is it really possible to have a worship space that does everything well?  Yes.  Should you think that this is about a compromise? Think again, it is not.

The method of sound management that I have been using in churches is not of my design.  I cannot take direct credit for these successes.  I learned from an expert in Church sound.  This sound management system that is now in over 450 churches, is the same method as originated by the hand that guided the fingers of King David, who designed King Solomon’s Temple.  The acoustical system that I use is the same system that was designed by God.  As I said, I can’t take credit for the success in the churches that have this system.  Here is condensed version of how I learned about it.

Years ago, I had read or heard this verse in 1 Kings 6:29, which says that on all of the walls within and without, there were carvings of Cherubs, Palm Trees, and open flowers.  Then one day and as the pastor was reading this passage from the pulpit, it dawned on me that the palm trees seemed out of place.  They have no aesthetic value.  There is no spiritual, nor ritual reason for having palm tree carvings on the wall.  Then the acoustical knowledge I was learning at the time kicked in.  If there was no acoustical treatment within the temple, the Levite Priests would have not been able to understand each other.  That room would have been ringing well over 5 seconds.  Under those conditions, even at 24 inches, the reverberation would have made it difficult to impossible to understand speech.  It says that in the large room of the temple called the Holy Place, that the priests taught, they read the laws, they played musical instruments, they sang and prayed.  They also did rituals that would have involved speaking.  What was in the room that allowed them to do all of those activities, which are also the same actions we do in churches today?

After doing a lot of testing and experimenting, I discovered that the shape of the palm tree could be mimicked with cheap cardboard tubes. This changes the performance of any existing church into a high-quality worship space that supports both congregational singing and speech.  Before installing any churches with cardboard tubes, we tested a number of churches.  For the first church tested with cardboard tubes, we used 10 and 12 foot long tubes, leaned them against the walls of a church and left them there for three weeks.  At the end of three weeks, not only was speech so much better, but the number of people participating in congregational singing doubled.  This was a huge surprise, and it was unexpected. We repeated this test in a dozen churches, and all of them had similar results. With those outcomes, I started recommending churches to use half-round tubes around their worship spaces, and every time as a new installation was completed, the results were almost all the same. (Let’s face it, some room shapes are better than others.)  Speech improved, and congregational singing always was much better.

In most cases, at the 6th month follow up to an installation, the contact person would tell me two things.  The first was an attendance increase.  The second was that 65 to 90% of the congregations were singing every song.  In most cases, there was no change in leadership, or order of worship or how singing was conducted.  All of the deadspots in the room were gone.  Now you could sit anywhere and sing out and feel like you are part of something big.  Sometimes I also got glowing reviews of how the sound system was fixed when nothing was done to the system except for some equalization. 

Since around 1994, over 450 churches have applied this method of managing the sound in their worship spaces.  All of them have reported similar results.  The interesting thing was, most of these churches didn’t hire me to fix their congregational singing.  They hired me to improve the performance of their sound systems.  They wanted better speech intelligibility.  The half rounds tubes are the most cost-effective solution to improving the performance of any sound system.  This method fixes the sound system much better than using any absorptive panel. 

There is also a unique feature that half-round tubes have that no other acoustical system can do.  The half-round tubes, when laid out in a specific pattern, can equalize a room.  By adjusting the spacing, the sizes, and when using prime number sequences, if there is enough wall space, you can cut up to 40dB of excess sound energy from 50 to 1200 Hertz.  If your worship space has excess energy, for example, at 400 Hertz and it feeds back there all the time, you can space the diffusers to cut out that frequency range.  No other acoustical system in the world can do that.  The most powerful acoustical system in the world comes from the Bible, and it is designed by God.  Many people say that the Bible is sufficient in all things, and this is another example of that Biblical truth.

We have to stop blaming worship leaders, song leaders, and pastors for the lack of congregational singing.  Saying things like changing the key to sing in or changing the order of music is blaming the worship leaders, and because of acoustics, all of their efforts cannot get any significant results because the room will cancel their efforts.  Song leaders are always searching high and low for answers, and if you watch them carefully, they are constantly trying new things to get the congregation to engage more.  Sure, for the short term, they might get an additional number of people singing, but after a few weeks, it goes back down to where it was before.  It’s not that people don’t want to engage; it is because the room will not allow them to participate in group singing.  This is the real reason why so many churches with contemporary worship styles have sanctuaries that are as good or better that performance clubs in Las Vegas.  So many churches have turned to an entertainment style of worship.  How un-Biblical is that!

On the internet, there are plenty of videos of young people in churches with hands up in the air and swaying to the music, but if you look closely, most of them are just mouthing the words, they are not singing.  That is not worship.  When what goes on in a sanctuary looks more like a rock concert, it is not church or worship.  It is just clean, mostly unspiritual entertainment. 

If there is any blame to go around, here is an uncomfortable truth.  When I am hired to help a church, congregation members always tell me how, for years, they have been complaining to the church elders.  Since churches are so reluctant to share their experiences with sound to other congregations, most church elders feel helpless because there are no standards for church sound and acoustics for them to turn to.  When they ask consultants for help, they say, ask 10 sound guys what to do, and you get 10 different answers.  This madness has to stop.  The Bible has the solution, and it is a solution that just about any church can afford to do. 

The best way to improve congregational singing is by fixing the worship space to the same standards as outlined in the Bible.  In the end, this is the only option.  If your church already has more than 65% of the audience singing, you are most likely not having an issue of the congregation being engaged in worship.  For the rest of the churches out there, seek out what God can do for you.  You don’t need an expert or acoustical consultant or sound system engineer to have a successful transformation.  Churches can do this on their own.  All you have to do is look at the examples on my website and copy whatever layout you see.  If you need more help and can afford the cost of a consultant, hire one who understands the Biblical way to solve church sound problems and congregational singing.  There is no mystery or formula or program when solving the congregational singing issue God’s way.  Congregational singing is also a spiritual issue.  It is what binds up together as believers.  Stop solving spiritual problems using mans’ ways.  God’s way always works.  Don’t take my word for it.  Trust God.

(c) By Joseph De Buglio March 2020.

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What are your Church Priorities about sound when it comes to preaching the Gospel?

Posted by jdbsound on February 25, 2020

Is the performance of your worship space a priority?  Is the message always crystal clear in every seating position, and over 60% of the congregation is singing all the time?  If you say no to either or both questions, and you want your church to sound right for speech and music, the biggest obstacle is often the acoustics.  The second is money.  The third is aesthetics.

Fix the room!  How?  Follow what the Bible says, and you will not be disappointed.  After all, it is God’s plan, not man’s idea.  Do you think that the results will be less than perfect if you follow His plan completely? Isn’t the Bible the Living Bible?  Since when did the Bible stop teaching us new things about science?  Check out Solomon’s Temple, and the answers are there.  They always have been. It’s just taken a while to join the dots.

But it costs too much!  Oh, you mean the cost of a few floor monitors or a couple of wireless microphones considered too much?  That is often the cost of the Bible’s way of fixing the acoustics or about $3.50USD per seat for a 300 seat church. (Not including the price for the knowledge of knowing what to do.)  Replacing a mixer costs about $15.00-21.00 per seat.  Replacing pews for chairs cost about $75.00 per seat.  Buying 10 Shure SM58 mics with cables and mic stands – costs about $1,500.00.  Fixing the acoustics of a church is cheaper than you think.

If the look of any acoustical treatment is a concern, ask yourself this.  Are you there to worship God or the building?  Fixing the acoustics is like saying you are more interested in hearing what God has to say through your minister.  Putting up with acoustical problems, poor quality congregational singing, and accepting a sound system with limited performance is like saying the building is more important than the message and having fellowship with other believers.

It all comes down to priorities.  The primary purpose of any building that is a dedicated House of God is the preaching of the Gospel.  A place where the Gospel message can be spoken without distortion or interface.  That includes making the room behave as God would want us to have it.  The second priority is the breaking of bread and drinking of wine in remembrance of what Jesus did for all of us.  The worship space has to support this event as often as each church chooses to remember.  The next priority is congregational singing.  There isn’t any other experience that can replace the joy and excitement of a room where more than 75% of the audience is singing.  Songs that tell stories of Jesus, his atonement of our sins, and of people who follow Jesus are powerful in bringing people together.  It takes the same quality of acoustics to hear clear speech as well as great congregational singing.  These are the things that matter when you are a part of the Kingdom of God.

While I do have a business about church acoustics and sound, there is no possible way for one person or one company to fix all of the churches out there that need help.  By making this public, it means that no one can patent it and force churches to pay a license fee. It means that no one can control it and inflate the cost of fixing existing and new churches.  Churches should use the Bible’s methods with confidence, to apply in faith what God teaches, even without expert help.  When churches take such a leap of faith, in most cases, the results are outstanding.

This information is being shared because I care more about winning people for Christ through better sound than creating a business empire.  By revealing what the Bible teaches, by showing that science backs it up, that it is affordable for every church to have excellent acoustics, this is all part of the Great Commission.  If more people with a passion and skills like mine, were to apply what the Bible teaches about sound, we could make a difference.  Mat-7:15.  Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves. (KJV)  If you have the chance, read the rest of what Jesus said in Mathews 7:15-20. Don’t trust me.  Trust the Bible.

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Is your minister preaching a distorted message unintentionally?

Posted by jdbsound on February 17, 2020

When sharing the Gospel, so many times, someone has said that they didn’t like what the minister said during a worship service, so they left the church.  They thought the minister was preaching a false message.  Some people have told me that they walked out of a worship service upon hearing the distorted message.  I would ask them if other people left the service at the same time.  In every case, they said no.  That is when I try to retrieve the audio record of that specific service.   As it turned out, on the recording, the minister said the right things, but why was it heard in the sanctuary as something else? 

The next step was to play the recording over the sound system and sit in the same spot the person complained about what he heard.  Sure enough, the same gibberish that got the person upset was heard in that spot.  When you moved several feet over in any direction, the sound was clearer, yet in other places, different words were being twisted.  With the recording on a loop, we found dozens of other places where the minister’s words were warped into something else.  Doing this exercise did get one person to try church again, but in most cases, when something like this happens, most people will not return to a church where the Gospel is preached.

Sound quality matters.  What good is excellent speech intelligibility in one spot and a failure in another?  Sound quality can save people and their souls.  I have never met a person who was saved by a song, but I had met many people who were saved when they heard the clear and undistorted message of Jesus Christ and become followers of the Messiah because the message was clearly understood. 

I often wonder how many other people have experienced hearing something different than what the minister said in a sanctuary. For many ministers and church leaders, it would never occur to them that the sound system was the cause of some people not returning to church.  The unfortunate truth is, many churches have questionable acoustics, and when a person sits in a spot where words, syllables, or the sound volume is too low, what was said and what is heard were not the same.

Sound systems cannot fix the acoustical problems of a church.  Adding more speakers or applying the latest state of the art technology tricks are no match to Architectural failures in room design and unmanaged sound sequencing around a room.  Absorptive panels are often the first weapon used to tame a room.  Cutting down on the noise and reflections with absorption cannot fix deadspots or hotspots.  Absorptive panels cannot change the path of sound reflections that causes uneven sound distribution. Absorptive panels have been known to make the sound harder to understand in those poor locations throughout the room, not better.  What is needed is a different weapon to defeat poor sound.

To eliminate hotspots and deadspots, you need to be able to distribute sound more evenly.  Scattering the sound is the most effective way to create a unified sound field throughout the whole sanctuary.  When sound is managed in this way, not only does it eliminate deadspots and hotspots of any speech problems, but it makes congregational singing, praise and worship bands clearer, the stage sound is corrected, and for many churches, they bring back choral music because it sounds better than what a worship team could do before the room was fixed.  In most cases, scattering the sound costs less to do than absorbing sound. 

Acoustical solutions for churches that work should be common knowledge as these concepts have been around for years. Fixing a church can often be restricted by how a solution may look. It is high time that the aesthetic police take a back seat from preventing the Gospel message to be preached clearly.  If aesthetics are a big deal, alternatives are always possible.  In the end, it is all about priorities. You have to choose between hearing the Gospel or have a Church that looks good.  What will your church do?

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Does Your Church Need help with Sound?

Posted by jdbsound on August 1, 2019

Here is a collection of 445 photos of 46 churches that completed most or all of their sound system and acoustical plan.  My job is to design a solution that will solve all or almost all sound problems in one step.  For most churches, this means getting the most accomplished in one step as most churches can’t afford to keep chasing sound problems without truthful help.  The road back to great sound in the church is in the Bible, and that is what these churches did. 

All of the installations of the acoustical systems and the sound systems were completed by church members or local contractors when those churches were able to afford professional installers.  The final appearances are what those churches selected.  I work closely with all churches for alternative aesthetics regardless of any budget limitations.  When a church has to choose between aesthetics vs. performance of the 400 plus churches that have just simple painted cardboard tubes on the walls, those churches spoke with what they installed. 

These churches demonstrated that they care more about hearing the Gospel than having a sanctuary that looks good.  There is a high spiritual cost for poor acoustics and sound system designs.  Poor sound does get in the way of people hearing the Word, and for some, it can deny people from understanding the Gospel message of salvation, and that is a cost no church can afford.

For professional, no compromise help, we can provide the highest level of expert assistance that will fulfill the Great Commission as Jesus taught. Having the skills of the world helps but God’s plan for churches demands His way of doing Church Sound. Without that knowledge, the worlds way of doing church sound always comes up short in meeting the standard that God demands of us.

Click the photo above or the link below to see what other churches have done to have great sound for speech, congregational singing and total worship in general.

https://www.flickr.com/photos/jdbsound/collections/72157627021000982/

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The Scientific Foreknowledge the Bible Teaches about Church Sound?

Posted by jdbsound on July 26, 2019

Here is a fresh look at Solomon’s Temple and how it relates to Modern Churches today. Here is link to a 13 page article about church acoustics from the Bible’s point of view.
The Scientific Foreknowledge the Bible Teaches about Sound and Acoustics?

Introduction

The quality of church worship is critical to the health of a church.  The better the excellence of worship is, the stronger the church will be.  Quality of worship is not about packing the church full of people for the sake of filling a worship space so much that it becomes necessary to keep building bigger buildings.  We worship God, not buildings or pastors or knowledge.  It is the Gospel, the Bible that leads us to God.  It is God’s words that keep us in a relationship with Him.  The strength of a church is not measured in numbers in the seats or money.  Jesus taught us to feed the hungry, clothe the poor, and shelter the homeless.  The Bible teaches over and over again that we are to live by example (Psalms 1:1-6), to be a light in the world (Matt 5:16), when they see that we are different (James 2:14-26), it will be that difference that will attract people to God.

The strength of a church is measured by how people support each other, and by how much a congregation supports each other as a family first, as brothers and sisters, and then the local community.  Is the church feeding the hungry, clothing the poor, and sheltering the homeless?  The modern version of Jesus teaching for us in countries with a democracy and wealth should look like this.  Is the church cutting lawns, clearing driveways, cleaning people’s homes, fixing up members and non-members homes?  How often are church members spending time with the widows, the singles who have never had a partner, or the elderly?  Are these not the things included in what Jesus told us to do?  Are not these the same teachings in the Old Testament?  This is just a small sample of how Christianity should look like to the secular world.

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After reading the full article, please comment on it. We want to get this right as the church community needs this knowledge. If you have any questions, want to learn more or see a presentation about Solomon’s Temple and the Modern Church, contact me here – jdb@jdbsound.com

You church may be one of those that has great sound for all parts of the worship service. If it is, you should let everyone know as it will help to bring more people in. You should let us know so we can tell others. If you find this article helpful, please pass it on. Pass it on to your pastor, your friends and family. Give them the chance to learn what God can do for them today!

Thank you.

All modern churches can benefit from Biblical Acoustics
All older churches can benefit from Biblical Acoustics

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1 + 1 = 3 or When is Doubling the Power, not +3dB?

Posted by jdbsound on June 17, 2019

Here is a simple test anyone can do to determine the acoustical condition of a church.  Physics says that when the power* is doubled or when doubling the number of speakers, the sound level will increase 3dB.  This result is real when outdoors.  This outcome can be false indoors.  When it is false indoors, it is because there are acoustical problems.  Please notice that it is problems, not a problem.  When adding a second speaker failing to increase the sound 3dB, this test shows that it is never a single acoustical issue.  It is not a sound system problem.  The sound system is exposing the root problem. (If the second speaker is wired out of phase, the sound will decrease in level.)

Outdoors, sound follows the basic rules of physics.

When outdoors, if there are two loudspeaker playing with the same volume of pink noise side by side or up to 6 feet apart, and set up a test microphone or SPL meter 30 feet away. (An iPad or phone with testing software can be used if it is calibrated.) When the second speaker is turned on or off,  the sound level will change 3dB.  This result is constant in physics.  The reason this is always true is that there are no barriers around to limit the sounds from spreading out or returning from a reflection that can interfere with the direct sound.

When indoors, depending on the size of the room, often this is not true.  This failure is noticed the most with Subs and sound energy below 500 Hertz.  Doing the same test at 30 feet inside of a church, the sound level change is often 1, 1.5, or 2dB.  If the result is 3dB, there are either a lot of open windows, lots of doors that are open, the church has more than 3000 seating or the church has great acoustics. 

Indoors, sound is confronted with many other rules of physics which changes how the first rule works.

Here are the most common reasons for the sound failing to increase 3dB when doubling the power or speakers.

  • Standing waves
  • Dimensions of the room
  • Too much-stored energy in the corners
  • Too much high-frequency absorption

Standing Waves

Standing waves are excessive amounts of energy between parallel walls within a confined space. The effect of standing waves are not always apparent. Standing waves are usually excess mid and bass frequencies of energy that masks the highs. You can’t hear a standing wave but you can hear the effects of it. To identify if your church has standing waves, go between any parallels walls. Stand about 4 feet from one of the side walls. Make a loud, sharp noise like a hand clap once. If a person hears any rapid pinging sounds, this is a sign of the presence of standing waves. The sound heard is often a higher range of frequencies, and they usually called flutter echoes. Flutter echoes are a symptom of standing waves. Bass sounds, which have longer wavelengths can’t produce the same volume of sound to hear as a flutter between parallel walls. Whenever a person hears flutter echoes, excess bass energy present too. This result is also true for all other room shapes when flutter echoes or flutters from a simple hand clap occur

A second clue to standing waves is when standing at a pulpit or where a minister preaches from. With a hand clap, if the reflected sounds are coming from the side walls or behind you, the standing waves are the cause of it. The standing waves are masking the highs, creating the effect as if it is preventing a large portion of the sound from reaching the other side of the room, and what is reflected back is being canceled out by the standing waves a second time which in turn prevents you from hearing the returning clap. Standing waves have other detrimental effects too. It has the effect of isolating everyone from each other in the room. This result is also why the drums seems to sound so loud and yet, this is also why most drummers strike the drums harder than they have too. It is because they can’t tell how loud they are playing at any volume level. This outcome is also why many people sitting in the pews comment that they can’t hear themselves when singing, and it makes them feel alone in a room full of people. This is the number one cause of people being discouraged from singing.

Any church with parallel walls will have standing waves if there is nothing to manage them

The reason the sound doesn’t increase 3dB when adding a second loudspeaker is because of the excess bass energy created by the standing waves in the worship space.  The excess air pressure is like putting a finger lightly on the woofer.  The excess air pressure acts as an acoustical load on the woofer, and that dampens the amount of sound coming from the loudspeaker.

Standing waves can only be removed with diffusion or some form of sound scattering. 

If people try to use absorption to fix this problem, while it will remove the flutter or in some cases, shift the flutters to a lower frequency, the untreated bass energy will make the standing wave problem more pronounced.  It will increase the feeling loneliness and discourage the congregation from singing even more.

The dimensions of the room

In churches with low ceilings or seating less than 200 people, the room is too small to be free from surface related sound inference reflections.  In a larger church space with a flat ceiling less than 16 feet high, the room will have standing waves floor to ceiling which limits the ability to increase sound 3dB with just doubling the speakers.

The reason the sound doesn’t increase 3dB when adding a second loudspeaker is that the room is limiting how much the space can support.  The excess air pressure from the extra speaker is like putting a finger lightly on the woofer.  The excess air pressure acts as an acoustical load on the woofer, and that dampens the amount of sound coming from the loudspeaker.

The only option is to diffuse all of the room if a small church.  If a low ceiling, diffusers will have to be added to the ceiling.  Acoustical tiles and drop ceilings cannot correct this issue.

Too much-stored energy in the corners

Another principal of physic is how sound is affected by boundaries.  A loudspeaker on a 10-foot pole measures 60dB.  We call that free space.  When we put the speaker on the ground, the speaker will be 6dB louder.  That is referred to as “half space.”  When we add a wall and the floor, we call that “1/4er space” and the sound increases 12dB or doubles in loudness.  When we add a second wall to the floor and create a corner, that is “1/8th space,” and the sound rises 18dB. 

Corners collect the air pressure that is created by longer wavelength sounds that accumulate on the flat surface of the wall.  With nothing to direct the sound, the sound pressure moves in all directions.  Eventually, the excess bass energy makes its way to the corners.  Depending on a lot of variables, the amount of energy that builds up is often too much.  Churches will low ceilings, large flat walls, or flat ceilings tend to have too much excess bass in the corners.  All other church shapes, except for domes have varying levels of corner issues if not managed.  Excess corn energy has a similar effect as standing waves.  When there is too much bass, it masks the highs.  This, in turn, creates hotspots and coldspots throughout the room. Hotspots and Coldspots are frequency dependent. If the sound level changes are of a narrow range of frequencies, it was most likely found them with instruments.  When a person notices them with their ears,  it means anyone with a hearing problem will miss out on some of what is being said, or what they heard and what was said was different. 

When the front of a church is in the corner, everything is either 18dB louder or 18dB quieter when compared with churches that have the front on an end wall.

The reason the sound doesn’t increase 3dB when adding a second loudspeaker is because of the excess bass energy created by the bare walls in the worship space.  The excess air pressure is like putting a finger lightly on the woofer.  The excess air pressure acts as an acoustical load on the woofer, and that dampens the amount of sound coming from the loudspeaker.

Keeping excess sound out of the corners is best done with diffusion.  It cannot be done with absorption unless the absorbers are as thick as the wavelength of the sound waves.

Too much high-frequency absorption

Sound arrives at our ears as air pressure vibrating at a rapid rate.  The faster the air vibrates, the higher the sound pitch.  The slower the sound vibrates, the lower the pitch. The vibrations are referred to as Hertz.  Sound travel at 1130 feet per second.  At 100 Hertz, a bass sound has the wavelength of just over 11.3 feet.  At 1,000 Hertz the sound waves are 1.13 feet, and at 10,000 Hertz the sound waves are 0.11 feet or 1.3 inches.  

When there is too much absorption in the room, what is left is too much bass. The excess bass masks the highs. 

For most churches, carpeted floors and padded seating is all the absorption needed. When this much absorption is add, the congregational singing is very dull and people have to be super motivated to see more that 20% of the audience singing.

The reason the sound doesn’t increase 3dB when adding a second loudspeaker is because of the excess bass energy created by too much absorption.  The excess air pressure is like putting a finger lightly on the woofer.  The excess air pressure acts as an acoustical load on the woofer, and that dampens the amount of sound coming from the loudspeaker.

The fix for such a problem is by removing the right amount of absorption panels and replace them with diffusers.  Then complete the room by adding more diffusion throughout the sanctuary to correct the frequency response of the room.

These four issues are never a singular issue.  They are often in combinations or can include all four.  Along with these problems, there are often reverberation issues, echoes, excess late reflections, the poor frequency response of the room, and other room problems that have little to do with this simple 3dB test, but they are usually there as well.  These problems can be heard when a person learns what to listen for.  Looking at how sound system is equalized is another clue of room problems.  The issues have the result of the high numbers of the congregation not singing. (In a church with good acoustics, they will often have more than 80% of the congregation singing every they are familiar with.)

Getting two loudspeakers and doing this test is simple and easy to do.  If the sound doesn’t increase 3dB, this means that adding more subs or more speakers into a worship space will not get the expected outcome. For example.  If the goal is to increase the bass in a worship space 3dB, and sound system has only one subwoofer, do this test, If the bass increased only 1.5dB with the second box, then it will take two more speakers just to get a 3dB increase for a total of 4 boxes. Think of the cost of adding three speaker boxes and all of the related hardware required to support that.  An alternative would be to fix the room with diffusion, the gain will be 6 to 10dB of performance without doing anything to the sound system.  It would be equal to adding 8 or 16 subwoofers depending on other acoustical or architectural considerations.  

Science is amazing when appropriately used to provide real solutions. Pseudo-Science or fake data is often used under the disguise of science and can be used to lead churches to false conclusions.  Many experts in audio and acoustics who see the same data, know these problems are present.  If they are not being addressed, it is because they lack the experience in knowing how to solves such issues.  If a person has done this test and the sound system provider or acoustical expert is not addressing these issue, they are not qualified for correcting sound problems in a church.  It’s like asking a Doctor who specializes in kidney problems to do Brain Surgery. What is needed a Brain Surgeon who knows how to fix both the acoustics and to design a proper sound system.

Get the church correctly evaluated before investing in that next sound system.  It can save those responsible a lot of disappointments down the road.  Fixing a room can cost less than replacing a sound system, or it could mean reducing the size of the suggested new sound system.

* Doubling the power required calibrated volume controls or switches to set up correctly as a viable test.

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Really Useful Charts and Helps

Posted by jdbsound on May 20, 2019

This is a chart that gives you wavelengths of sound for all frequencies, speech and music ranges

This is a Church Height chart. These are minimum heights. Building new churches with lower ceiling heights degrades speech, congregational singing, cost more to heat, cool and maintain.

This chart shows the difference between the absorption rate versus decibels. For example, something that is rated as a coefficient value 0.5 is equal to 3dB of sound absorption.

How to Equalizer a church when you can’t afford professional help or your EQ settings have been changed and you don’t have time to get professional help. https://www.jdbsound.com/art/art537.html

Let us know if these files are useful. We would like to add more of them.

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Acoustics are like an Onion

Posted by jdbsound on March 2, 2019

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Churches are Tools

Posted by jdbsound on February 18, 2019

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Church Sound and the Gospel

Posted by jdbsound on January 28, 2019

The goal of any worship space and the church sound system is not about loudness, gain before feedback, intelligibility, special sound effects for the organ or choir, having the most talented performers in the worship team, how many wireless mics, number of channels the mixer has or the name brand of equipment you have. The goal of a church worship space and the sound system is to be a safe place where the Gospel can be presented clearly and with little to no blemishes. Where every person within the worship space can hear and understand the Gospel as clearly as when having a conversation with someone only 4 feet away and sharing the Gospel. Anything less than that goal means that the spoken word can be corrupted in the journey between the minister’s mouth and ears of all those who are listening. The Gospel needs to be broadcasted and understood as clearly as reading God’s written words.

If your church has hot spots, dead spots, good sound in these seats and poor sound in those seats, then the Gospel is not being presented equally to everyone. If your sound system has technical problems during worship often, then it is a distraction, and it can make the difference of understanding something important.

The chart below shows tangible results when your worship and sound system are tested. There should be three tests.

The first is with a test speaker. It is a point source speaker that is small enough to mimic a person’s voice.

The next test is feeding a signal directly into the sound system and test those results. This test is just about the playback quality of your sound system.

The third test is to use the test speaker 30 inches from an open microphone such as a pulpit or any microphone on a stand and test the combined results of the worship space’s acoustics direct interaction of the sound system and open mics. You can also do a second version of this test and place the test speaker 4 inches from a microphone where the microphone is 45 degrees off axis.

If all three tests are not in the Yellow section, the results will let you know if it is your sound system, the acoustics or all of the above.  This is also a better indication predicting if upgrading your sound system will improve the results you are looking for. This is also a strong indicator that your worship space needs some kind of an acoustical management system

sti alcons chart conversion

You can get your church tested. It doesn’t cost much, and the results can save a life or many lives, depending on your point of view. As an independent consulting company, we offer church testing and results with no obligation to use our services in the future.

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Church Ceiling Height Chart

Posted by jdbsound on December 26, 2018

There are three key parts to what happens in church worship.  There is the spoken word, there is collaborative/congregational singing, and there is performance singing.  For a worship space to support these three events where speech is first, then congregational singing and performance singing, you need a specific design and dimensions to support these functions well.  High-quality speech should not come at the expense of the music.  Music should not come at the cost of speech.  There is a balance, and part of that balance is to have enough ceiling height to support both speech and music in a contained space.

Unfortunately, churches these days are building lower and lower ceilings in their worship spaces.  A person can assume that when so many churches have experienced only poor quality acoustics, many wonder what is the point of building a taller worship space.

When a church builds a low ceiling, it limits congregational singing and it makes you more dependent on technology, but guess what!  The same things that limit congregational singing are what also limits the performance of the technology we affectionately call the sound systems.  So, instead of getting 100% out of your high quality, expensive sound system, you’re getting only 40 to 60% of the sound systems’ true performance abilities.  It is actually cheaper to build higher than the added cost of un-needed audio technology to make up the difference.   The chart below should clear the air as to the minimum height your next church should be. If you can afford to build higher, do it.  Also, a taller worship space does not mean being stuck with longer reverb times. A higher ceiling means natural room reverberation can be adjustable and is tune-able.  With a taller ceiling, you can change the frequency response of the whole room without needing a sound system or equalizer.

Minimum Church Ceiling height Chart.JPG

Church height is important for a worship space.  One of the biggest parts of worship is singing.  Congregational singing to be specific.  When singing as a group, several elements are required for a good and healthy worship experience.  There is chorusing, harmony, sound volume,or loudness of the singing and being able to hear yourself as well as the people around you.  When all of these elements are in balance, the worship experience is like no other.  The majority of people get a lot of satisfaction from the singing experience during worshiping in rooms that have ceiling heights that match the size of the seating capacity of the worship space. The above chart is the minimum of interior ceiling heights.  If you want to build higher, you can as the singing experience gets even better.

High ceilings allow for better sound system performance with less expensive sound equipment. (A lot of pro audio contractors, installers and equipment manufacturers don’t like hearing this.)  Higher ceiling permits better gain before feedback and it becomes easier to isolate drums and floor monitors. The performance of the sound system is much better too when that is coupled with a good quality acoustical management system.

There are economic advantages too.  The higher the ceiling, the cheaper it is to heat and cool when using a vertical displacement HVAC type system which is specifically designed for large gathering spaces for people.  Such systems cost less to install, they use smaller HVAC components and cost about 30 to 40% less to operate annually.  In addition, the cooling systems last 2 to 3 times longer before needing to be replaced. In a way, building higher cost less both in cost and in operation over time.

Another thing to consider. If building new, don’t build a flat ceiling that is parallel to the floor. (and it doesn’t count of you put in a sloping floor.)  Many churches that are moving into commercial buildings are learning the hard way that flat ceilings limit the quality of live musical performances and congregational singing.  Sure, there are acoustical panels that can slightly improve the room for amplified sound, but the cost doesn’t justify the returns.  There is little that can help congregational singing even if you have the height. Vertical standing waves are harder to manage than a horizontal standing wave. If you know what you are doing, horizontal standing waves can be controlled to create an outstanding room.  It is part of the formula for that perfect worship space.  Funny though, most concert musicians that perform in a church that I have fixed, they often make comments like, “I wish our concert hall sounded and performed as well.”  That is almost like saying, “concert halls make for lousy worship space but worship spaces can perform better than a concert hall.”

Finally, there is the Biblical standard for church sound.  For a 160 seat church as detailed in the Bible, the Biblical standard is the width of the room is to be 50% of the length and the height of the room should be 75% of the length.  However, we now know that anything over 45 feet high and less than 2000 seating, the extra height is not needed.  It is the length to width ratio of 2:1 is key and a constant height of 45 feet or 13.7 meters.  For those who don’t want long rooms, because of sound systems, we can use a length of width ratio of 2:1.7 or a room that is 100 x 70, and you must always use the room lengthways or you destroy congregational singing and speech.

God gave us the laws of physics for a reason.  When we obey God, we reap the benefits.  When we ignore God’s teaching, you will have your reward here on earth.  The sanctuary of a church is a battlefield where the hearts, minds, and souls of people can be adding or subtracting people from the Kingdom of God.  The acoustics of a church plays an important part in either adding or subtracting people.  The change is slow and often not noticed, but when you visit hundreds of churches that have their worship spaces upgraded to the standards of the Bible as best as possible, there have always been an increase years later, ( unless there have been leadership or church split issues.)

If you can, to get a better picture of planning a new church, read this article on Gods Authority in Church Design.

*Note* In most countries that have freedom of religion laws, the worship space portion of a church building has no roof heights limits regardless of local city building height restrictions. 

**Note** The data is based on 1200 churches from around the world. 

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What will give you the biggest bang for the buck in upgrading the Sound of your church?

Posted by jdbsound on May 2, 2018

This 300 seat church already had a reasonable high-quality sound system.  It was properly designed for the room and professionally installed. The acoustics were not that bad.  At least it was thought that the acoustics were not such a problem.  The outstanding issues they were trying to solve or improve were:

  1. Gain before feedback,
  2. Elimination of the few deadspots that were not solved from the previous sound system when the current new JBL speakers were installed
  3. Reduce sound spill from floor monitors,
  4. Better control of the drums (when using acoustic drums) and
  5. They wanted 3dB more bass from the Sub-woofer.

These are all reasonable reasons to upgrade the sound system.

Good Speaker System setup_s

The church was considered the following upgrades.

  1. Replacing the professionally designed and installed 12-year-old JBL sound system.
  2. They considered going for IEM (in-ear monitor) system for up to 8 people. (This would have included a new digital mixer)
  3. The church considered making an air-conditioned drum booth or get an electronic drum kit.
  4. They also wanted to add a second twin 15-inch sub-woofer.
  5. Estimated total cost, almost $26,000.00 installed.

This is what the church actually did. They changed the acoustics of the room.  They installed an acoustical Tube Radiator system.

What did they gain by doing this?

  1. The sonic quality of the existing JBL speaker system was greatly improved. The improvement was noticeable better regardless of how much equalization was added or when the EQ was bypassed. (Definite proof that the acoustics of the room changed the performance of the speaker system from the day they were installed.)
  2. All of the remaining deadspots were now gone. (This was never a speaker system problem as the right speaker system design was already installed.)
  3. The performance of the speaker system was such that picking up a person’s voice went from 12 inches to 35 inches with a Shure SM58 mic before feedback would show up. (Again, acoustics limits the performance of all sound system. Sure there are some very expensive gadgets that can improve gain before feedback, but such gadget can cost more than the material cost of the acoustical fix.)
  4. The floor monitors are now well behaved. No matter how loud the floor monitors get, you definitely need to and to add the front of house to hear clear sound. As it turns out, the overall stage mix dropped around 10dB without the performers even noticing as they were now able to hear the stage mix from the monitors so well at a lower volume. You could say that the monitor spill issue is eliminated.
  5. This eliminated the need for IEM’s.
  6. Since the drummer can hear himself now, he gradually started playing quieter after a few weeks. The need for a drum cage disappeared.
  7. The Single Sub-Woofer was now able to play 9dB louder without distortion. It would have taken 3 more sub-woofers to get the same loudness without distortion. That was equal to spending around $15,000.00. (Standing waves and bass buildup in the corners added air pressure onto the surface of the cones of the subs drivers. This added air pressure creates distortion. When the subs distort, the sound quality and maximum sound levels of what the sub is supposed to be able to do, can drop up to 15dB in many rooms.)

Aylmer EMC Church Pano 2017_ss

Other improvements

Congregation Singing.

  1. The participation of people singing went up from 30% to 75%. (When people can hear themselves and the other people around them, it encourages people to sing more.)  s a resulting, the congregation is singing 8 to 15dB louder. (The more people singing, the louder they will become.)
  2. No more distortion from the speaker system with playing louder which means the perception of loudness is greatly reduced. (Standing waves and bass buildup in the corners added air pressure onto the surface of the cones of the bass driver of full range speakers. This added air pressure creates distortion. When the bass drivers distort, the sound quality and maximum sound levels of what the full range speaker is supposed to be able to do, can drop up to 15dB in many rooms.)
  3. After two years, the congregation is starting to add harmonies to their singing. (That is what happens when people can hear each other.)
  4. Now when people stand up to give testimonies or prayer requests, people can hear them whenever they forget to use hand-held wireless audience microphone.
  5. The front of house stage mix is so much better. Now you can hear all of the performers without having to blast the sound system. (A well-diffused room can make the signal to noise ratio improve from 3dB to 25dB. As the signal to noise improves, the easier it is to settle into a high quality.)
  6. The worship space is now concert quality for any high SPL event, recitals, choirs or orchestral events.

The total cost of the acoustical system including painting the whole sanctuary. $1,400.00
Since this as a DIY project, the money saved went towards a better headset mic for the pastor and the new digital mixer. Total upgrade, $5,000.00. If the church contract out the installation of the Sono Tubes, add $5,200.00. That is still 60% of the cost of upgrading a perfectly good sound system if everything is contracted out or an 83% difference.

Conclusion

One can honestly say that fixing the acoustics had a far better return on investment versus just upgrading the speaker system alone. Upgrading the speaker system can never make the room sound better, improve congregational singing and it would have not been possible to delete the deadspots without adding more speakers on delays around the room. This transformation is typical of the new worship experience when a church gets the acoustics they are supposed to have. In the battle between acoustics vs sound systems, acoustics always wins. It’s Physics. Try moving a wall with air? You can’t. Change the wall and hear what happens!

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Dead Spots – Sound System or Acoustics?

Posted by jdbsound on April 9, 2018

An unwelcomed guest in any church is Mr. Deadspots. Unfortunately, deadspots in churches are more common than you think. There are two main types of deadspots. Some are frequency related/comb filtering interference and others are dips in sound levels greater that 6dB created by the room.

It is common to see frequency related deadspots in Left/Right sound system regardless if they are Line Arrays or point and shoot speakers. These deadspots are created by interference patterns in a mono speech system as a persons voice is always mono.  These deadspots are where you shift from one foot to another and notice a sound change. In these cases it becomes a problem when on one foot you hear the highs but not the lows. When you shift your position onto the other foot, you hear the lows and the highs disappear. People with hearing aids or early stages of hearing lose notice this the most. People with good hearing notice the change too but learn quickly to put up with it. Some young people think of it as a passive noise filter. If the music is too bright, stand to one side of your seating position. If the music is too boomy, shift to the other side of your seating position. Really! Isn’t that like buying a headset and controlling the sound changes with what angle you tilt your head. It might sound like a great idea until you find yourself with a lot of neck pain. No thank you.

Sound level dips are usually acoustically related. These are created with standing waves, bass building up, hollow walls, room corners, and parallel surfaces that include walls, ceilings and floors and concaved surfaces. In all of these cases, often mid and bass energy build up and the highs are absorbed with carpets, padded pews and people. By the nature of churches and how they are used, carpeted floors and padded seating often represents how the church sounds when it is 50% full. That means that if your attendance is often over 50%, the effects of padded seating and carpeted floors has little to no impact. If church attendance is often over 70% a carpeted floor makes the room more intimate during times of prayer and solemn reverence. In the end, carpets and padded seating is a good thing.

However, because of people in the room, once that room attendance is above 50% the people absorb enough highs that extra mids and bass energy is left behind as is being amplified between parallel surfaces. This excess energy automatically masks the highs. When the highs are masked, speech and music intelligibility drops. The kicker is, if you go around the room with a sound level meter, often the sound levels don’t drop much, even when you stand in a spot where the highs (when you measure just the highs) drop off over 6dB. That is because the excess bass energy is so strong that it fools the sound meter as the meter is reading an average sound level. When you take sound level readings by frequency, then you notice the high number of deadspots in the room. Get a tone generator in a cell phone or computer app and play a constant tone at 55dB at 500 Hertz, 1000 Hertz and 3000 Hertz and then start walking around. At 500 Hertz you shouldn’t notice much of change until you get close to walls. At 1000 Hertz you will notice more changes. At 3000 Hertz, if you are hearing a lot of changes, imagine what 25% of your church audience is experiencing.

Here is a church that had both acoustical and sound system created deadspots, with a central cluster. By nature of a central cluster, in a good room, it gives the best coverage and performance for speech. There is no better way to design a church sound system unless your ceiling is less than 14 ft. high. Choice of speakers, coverage patterns and speaker placement impacts sound too but these are mainly tone qualities and gain before feedback related. It may have up to a 2 or 3% impact on overall intelligibility as well.

corner view pano Ebeneezer Church_s

In this church example, it already has a fairly good quality speaker system in the ideal location for the room. It is designed as a central cluster and by nature, in this setup, it should perform well. However, it didn’t matter if you used the main speaker system or used portable speakers on stands, with any sound amplified you could find deadspots all over the room. On top of that, if you raised your voice in the room, once you were more than 18 feet from someone, understand what was being said was difficult to impossible depending on dictions of the person talking and how good is one’s hearing. When the proper acoustical fix was applied, all of those problems went away and the church didn’t need to upgrade the speaker system.

The church decided to leave the sound system alone as the gain before feedback improved and all of the deadspots disappeared. Since this is a traditional church that has no intentions to do anything contemporary, the acoustical fix was designed to not change the overall reverb time. Before and after reverb time remained about the same. 1.7 seconds.  It was the frequency response of the room that saw a major change. As the graphs shows below, where the mixer for the worship space was located, it was also one of many spots where weird measurements were recorded before. We found dozens of spots where the room measurements went squirrely. This is typical of the results of measuring a Left/Right speaker system, not a cluster system. These weird results were a result of room acoustics and not the sound system.  We used our own test speaker for all room testing.

Sound Booth Before and After

After checking our test equipment for errors, it was then realized that by just moving the mic over a few inches, you would get a very different result. In some places, the sound was perfectly fine but move over a few inches and it was not. Our ears are about 8 inches apart. In one row of seating, the largest distance we could move the test mic between a good spot and bad spot was 14 inches. Pew seating is 18 inches.  Every seating position had both good and bad sound. What we were measuring was sound masking in the mids and lows.  The energy was so strong that it masked the highs.  Not only that but the highs were most likely also being canceled from nearby wall reflection between 1800 to 5000 Hertz.  It gave the impression that there was something wrong with the sound system.

In this church, people marked their seating positions by placing personal pillows in spots where the sound was better. Sure enough, testing these spots showed better sound before the acoustical treatment was applied. After the acoustical system was installed, the sound was the same no matter where you sat including the sound booth.

Deadspots in churches are more often a result of worship space design and not a result of sound system design (unless you have the wrong speaker system design for your room). When a church replaces a well-designed sound within 10 years, and have little to no overall improvement after an upgrade, that should be a BIG RED FLAG that you most likely have a serious acoustical problem and no amount of money spent on the sound system can make those problems go away. Besides, these days, acoustical fixes cost less than sound system fixes. As a caveat, our experience has been this. Churches that have fixed their acoustics and then wanted on to expand their music programs, they were able to upscale their sound system with a much higher budget as they upgraded, it actually lead to better performance rather than an exchange of one set of problems for another.

Bottom line is, get your church properly tested. Have someone who knows how to properly diagnose the data, and then design your church a proper acoustical management system. Install the acoustical system and watch the congregation respond and grow. Don’t be surprised if other churches want to use your church for musical and recording events. Your property value may go up too.

Note – The acoustical system is made up of 8 and 12 inch half round plaster covered foam diffusers on 3 walls.  The side walls use a gradient pattern to maximize room performance. On the back wall there are 24 units of 7 ft. x 2 ft. x 18 inch plaster covered foam diffusers that are hollow which allows for additional passive room equalizing in the near future. Project completed by church members.

By Joseph De Buglio
JdB Sound Acoustics

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Where are the Carboard Tubes

Posted by jdbsound on August 28, 2017

Churches use a lot of Cardboard Tubes in acoustical room fixes because they are very effective in getting the room performance they want and need.  Cardboard Tube not only outperform all other acoustical products in churches but they are also the most affordable.  There is nothing that can do what half-round tubes can do, even at 40 times the cost.

Ok then, what if you don’t like the look of cardboard tubes around your worship space.  Here is an option some churches have been willing to spend a little extra for.

image10

These look like standard 5 inch deep absorbing panels.  They are not.  These are Sono Tubes mounted in a wooden frame and covered with cloth.

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The cloth was an added expense and it was worth it.  The fire rated cloth is expensive and before covering the panels, you want to make sure the acoustical system is going to work and work it did.  The church is very happy with the results and they are enjoying the room.

image8

This is what the installation looked like before it was covered.  The wooden frame has no effect on the performance of the half round tubes.  The cloth only affects frequencies above 10,000 Hertz which means they have no effect on speech or music.  In this installation, three sizes of tubes were used.

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At the bottom is a huge video wall screen.  On the wall are the Sono Tubes.  Yes, the tubes will work behind a vinyl screen.  If you notice the pattern of the diffusers on the wall. that pattern was needed to control lower mids and bass sound energy.  This pattern was pretested in our test room.

northside church video wall

Here is the finished installation of the video system.  It takes three projectors for each screen.  The center screen is a video wall.

Photos courtesy of Frederic Lachance of Northside Church in Coquitlam BC, 2017.

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True of False about new Christians

Posted by jdbsound on December 4, 2015

True of False.

Most new Christian first heard about Christianity through a sound system when visiting a church or from TV or some other multi-media.

Please write your comments below.

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