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Posts Tagged ‘Church’

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.

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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 centre screen is a video wall.

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

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Church Ceiling Height Chart

Posted by jdbsound on May 26, 2017

Churches these days are building lower and lower building.  I guess when so many churches have experienced only poor quality acoustics, many wonder what is the point of building a taller worship space.  As it turns out, existing worship space acoustics is doing fine and a lot of churches are are getting their acoustics fixed, sounding better today than they ever did before.

When a church builds a low ceiling, it limits congregational singing and it makes you more dependant on technology, but guess what!  The same things that limits congregational singing is what also limits the performance of all sound systems.  So, instead of getting 100% out of your high quality over priced expensive sound system, your getting only 40 to 60% of the sound systems true performance abilities.  It is actually cheaper to build higher than the added cost of audio technology to make up the difference.   The chart below should clear the air as to the minimum height your next church should be.  Also, a taller worship space does not mean being stuck with longer reverb times. A higher ceiling means natural room reverberation is adjustable and tuneable.  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 matches the size of the seating capacity of the worship space. The above chart are minimum heights.  If you want to build higher, you can as the singing experience gets even better but the improvement is more subtle.
High ceilings allow better and less expensive sound systems to be used.  Higher ceiling permit better gain before feedback and it becomes easier to isolate drums and floor monitor. 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.  In addition, the cooling systems last 2 to 3 times longer before needing to be replaced.
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 hard to manage than 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 the almost 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.”
*Note* In any country that has 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 2800 churches from North America, Europe, Philippines and Central America. 

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Professional Sound Magazine Article

Posted by jdbsound on August 6, 2016

Here is the full Professional Sound Magazine Article about the Romanian Pentecostal Church in Kitchener, Ontario Canada.  Please leave any comments or questions below.

Should you have a chance, when your in the area, visit this church.  The people there will give you a tour. Better yet, go to a worship service.  it is different, but worth the experience.

Joseph De Buglio

 

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Can Acoustical Spreadsheets Save Your Church Acoustics?

Posted by jdbsound on June 20, 2016

There are dozens of acoustical spreadsheets that come with the promise of a viable acoustical fix.  Some sheets are for studios and some are for home theatres.  There are also other spreadsheets for larger rooms.  As rooms get larger, (as in Christian Churches and worship centers) those spreadsheets become less accurate.  Sure, the better spreadsheets adds more variable to compensate for the limitations, but the limitations are still there. Furthermore, with all of the spreadsheets, you have to add an additional line to include a fudge factor.  In some spreadsheets you need to add multiple fudge factor lines.

When a person tries to use an acoustical spreadsheet, they are only looking at one parameter of the rooms acoustics.  You are only looking at “time.”  The problem is, for churches, and I MEAN ALL ROOMS WHERE MORE THAN 150 PEOPLE GATHER TO WORSHIP – there are other parameters that are equally or more important than “time.” Acoustical problems always come in layers.  The minimum number of layers of acoustical sound management in a worship space is 4 layers.  As a worship space becomes larger, the more layers you have to attend to.  “Time” becomes only a fraction of the real acoustical problems you are faced with.  Obviously you can’t see them but you can measure them if you are trained to recognize when you hear them.

Romanian Church Kitchener Ontario Pano 1.jpgThe problem with spreadsheets is that they are not looking issues such as standing waves – and every church – regardless of shape has standing waves (unless the space is acoustically managed in the first place which also means this article is not for you.)  Spreadsheets are not looking at excessive noise from early and late reflections.  They are not looking at bass buildup often found in the corners of a room.  They are not looking at flutter echoes and full syllable echoes.  These are all sound effects than can’t be dialed out with equalizers, delays, algorithms and the next miracle digital gadget or software. (Yet that is how most sound system designers try to deal with room acoustics.)

Regardless of a persons acoustical training, knowledge or experience,  a spreadsheet cannot tell you when standing waves are masking flutter echoes.  A spreadsheet cannot tell you when bass build up is masking a standing wave issue.  A spreadsheet can’t tell you how much the early and later reflections are reducing music and speech intelligibility. 

All that a spreadsheet can tell you is how much “time” it takes for a sound to decay in a room either as an average number.  Some spreadsheets are much more detailed and they have been written as an attempt to calculate a room in octaves or by 1/3rd octaves.  If it was only that easy.  Measuring and calculating time is just a sliver of the acoustical signature of a space people worship in. 

church of our lady small.jpg

It takes a lot of training to learn Church acoustics.  The same applies to Studio Acoustics, Recital Halls, Concert halls and lecture halls.  All of these rooms have specific acoustical needs and they all require a unique set of skills to properly fix them.   

What makes a church so complicated is in how a church is used.  When a church is designed as a “church,” it becomes the most multipurpose space there is because of all the ways a worship space is used.  When you say you want the worship space to be more “Multi-Purpose” or more flexible in it use, you are actually limiting what a basic worship space is supposed to be able to do. 

At the end of the day, an acoustical spreadsheet is only a small snapshot into church acoustics.  It can’t help with congregational singing, it can’t help with a noisy stage for a praise and worship team or choir and it can’t help with drum issues or speech intelligibility. 

What often happens is with the spreadsheet, it will guide you to a solution that is based on absorption.  When an acoustical fix is based around absorption, you wind up “killing” the room for all music – especially contemporary music and congregational singing – and the masking effects of the other acoustical issues get worse.  Sure, the room sounds more tame than it was before, but the ability to understand speech is either no better than before or it has gotten worse.  Before you know it, everyone gets in ear monitors and all of the members of the worship team have to sign an insurance liability waver stating that they will not sue the church for any future health problems with hearing loss.  Seriously, is that the kind of acoustical fix you want? 

Front view of creekside church_edited-1.jpgThat is what you get when you turn to an acoustical solution based only on spreadsheet calculations.  To top it all off, the results are not much better when using computer simulation software programs.  Simulation programs only show you the results at one frequency at a time.  The computer generated image may be 3D but the patterns they show are only one frequency at a time – even when it is averaged out.  To see large room acoustics in a simulation, you need to be able to see the results in 4D.  Hologram can’t show you 4D images.  That ability hasn’t been invented yet.  You need to be able to see sound in 4 dimensions because all sounds are complex.  Every sound made on earth is a combination of wave lengths that are generated at the same time. Some parts of a sound are measured in feet and some in inches.  There is no way to visually see 100 Hertz, which is 11 ft long, and 4000 Hertz which is 3.5 inches long, at the same time in the same place yet in real life, that is what is happening with sound.  We all take sound for granted but the complexity of sound is extensive.

But doesn’t sound follow the rules of fluid dynamic and other laws of physics?  Of course it does, but only when you examine one frequency at a time and that frequency is never a pure tone.  It is always complex.  The only place you can measure and see a pure tone is in a machine like an oscilloscope and the moment you launch that sound into the air, it becomes complex.  Just as sound is complex, so are the acoustical fixes for churches. 

jdbsound test room.jpg
This is one way to test an acoustical solution before you recommend it to a church.  Have your own testing facility.  Whatever research is done in this room, it mathematical translates perfectly when it is scaled up into a larger space.

As a mantra, remember this:  for all Christian churches, acoustical problems come in layers and whatever fix you choose, it has to address all of the layers in one step – which is possible if you want an affordable fix.  There are many tools in the Acousticians Tool Box to fix a worship space. There are diffusers, resonators, traps and other devices that can address the needs of a church’s acoustics. There are also stand-alone electronic solutions that work in certain worship spaces. You need a lot of training to know which ones you need, what combinations you need and how to use them, and the last place you want to do your training and experimenting is on your customers. 

If you are doing Church Acoustics or trying to fix your own church, don’t do it as an experiment and you know it will be an experiment the moment someone in your committee say something like, “lets try this as see what happens.”  With those words, the acoustical solution is already doomed.  Experts like myself can tell you the results the second you decide to try something and long before you apply the materials. 

History shows that after a church spends it’s money on a thing such as acoustics, it will not be able to afford to fix any mistakes for decades.  If the results makes the room worse or no better than before, then you are subjecting the church members to more sound abuse for years to come and we don’t want that.  Spreadsheets don’t fix churches, good training and expert help does. (It’s also cheaper in the end to get expert help.)

Finally,  consider this.  The internet has become a treasure trove of knowledge.  That knowledge is often presented as expert information offering sure fire solutions.  I scan the internet often to see what is out there.  There is a lot of great information and there are a lot of myths.  When you collect all of that info, it only holds a fraction of the total knowledge about church acoustics.  If we were to put a percentage on it, the internet holds about 2% of the total knowledge there is for church acoustics.  The books hold another 8% of what there is to know about church acoustics.  Church acoustics is so complicated that often, a seasoned acoustical expert like myself will have to fix one of a kind acoustical fixes often.  Those unique fixes are often not shared because others may think that the one of a kind fix would be needed in every other church that has the same problem.  You can have 10 churches with the same acoustical problem but in every one the fix has to be modified because of the other variables that have to be included.  The rest of the knowledge about church acoustics is held by experts because the church community hasn’t taken ownership of that knowledge yet and there is no system in place for churches to share their experiences in order to avoid mistakes in the future.  What is missing is the wisdom in knowing what acoustical fixes will enhance worship verse what acoustical fixes exchanges one set of problems for another set of problems. Problems which holds back and undermines the real worship experience the church leaders want you to participate in. 

All church can have great acoustics and sound.  If each church denomination or independent church were to set-up their own “Church Sound Standards” for the performance of their sound systems and worships space acoustics, churches will become the kind of places where people want to go.  Once a standard is set, every church will have a Worship everyone can enjoy and appreciate. 

Joseph De Buglio
Acoustician and Expert in Church Acoustics.

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New Church Sound System Equalization Schedule

Posted by jdbsound on February 17, 2016

Notice to all Clients of JdB Sound Acoustics.

If you are in a new church building or you have done major renovations in your church, you will have to re-equalize the sound system many times in the first few years.  Here is the Schedule you should follow.

  1. First year – After the 1st month, 3rd month, 6th month, 9th month and 12th month
  2. Second year – After the 4th month, 8th month and 12th month.
  3. Third year – same as year 2
  4. Fourth year – after the 6th and 12 month.
  5. Fifth year – same as year 4
  6. Sixth to tenth year, every 8 month.
  7. After that, once a year.

It take up to ten years for most building to fully cure or longer depending on how much concrete and wood is used.  For that reason, the humidity of the church becomes lower and lower as the church ages which also changes the sound of the worship space.

Also, depending on the climate area you are in, you should be re-equalizing your church sound system for each season.  more so the further you are from the equator.  If you have a digital processor or mixer, you can have presets for the room changes.

Joseph De Buglio

 

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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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Connecting Cell Phones or consumer playback devices to a Sound System

Posted by jdbsound on November 8, 2015

Well, it finally happened to me.  After warning other people for years to use a Direct Box when connecting to a sound system, what did I do, connected an IPad to a mixer with an adaptor from 1/8th stereo to 2 channels of Balanced outs.  Then boom, the IPad headphone output was fried.  How?  The mixer had global Phantom power on all of the channels and because I went into the balanced inputs rather than line level 1/4 inch inputs, the voltage of the phantom power fried the IPad.

When I brought my IPad in for repairs, fortunately it was just the headset circuit that was damaged.  The owner of the repair store said that he had seen this problem before with other IPads, computers, portable CD players and cell phones.  With one person, their IPad was so damaged that the IPad had to have the main board repaired too.  Ouch.

Fortunately, there are a few direct boxes you can use that are purpose made for connecting from consumer to pro audio equipment.  What you want is a direct box that will give you 1/8th stereo and RCA two channel input to two channel stereo outputs via XLR’s.  Some model have a switch for stereo or mono outputs.  Pad switches and ground lifts are a must as well.

On this project we were firing up the speaker system for the first time. I needed stereo output and we used an older mixer that was in storage.  We hooked up to two channel and we were outputting to stereo (even though this will be a mono system.)  OK, I wanted to impress the people who were in the room at the time.  The demo and initial speaker setup was a great success but I happened to remove the connections from the mixer while the mixer was still on.  Not sure if the unplugging or the circuit that was heated up so much that when it cooled, it came apart that signed the connection failure but the next time I turned on my IPad to hear something, it would not work.

Either way, whether you are using a PC, Laptop, Cell phone, IPad, IPod or any consumer product that has 1/8 or RCA outputs, get a proper Direct box.  They range in price from $69 to $160.  That is cheap insurance considering that fixing my IPad cost about $100.00 and 7 days to get the parts to repair it.

For sound quality and extra insurance, get DI boxes that have transformers on the input or output side.

Joseph De Buglio

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A Rant about Church Bible Studies and Mid-Week Meetings!l

Posted by jdbsound on May 14, 2015

I know I’ve had my head buried in the sand successfully getting people to come to church on Sundays.  Better acoustics and better sound does indeed equal more people coming to Sunday worship but what ever happened to the mid-week meetings where people can study the bible and have open discussions? Where do people go if they want something more than just Spiritual Milk and Pablum as what is mostly taught on Sunday mornings?  What do you do if you want to add some spiritual meat into your diet?

In recent years I have started looking at church bulletins, their web sites and have spoken to many church pastors.  Since I travel so much, it has been hard for me to get out to my own church but I do get to speak to other fellow Christians all the time.  Couldn’t help noticing that the most common thing missing from many churches is the mid-week meetings for adults.  Cell groups were popular for a while but they seem to be disappearing as well.

When the question about mid-week meeting was put to some pastors they gave some of the strangest answers ever.  In their replies they say things like, “You’re supposed to feed yourself” or “you can’t control those in the midweek meetings as it seems they all have secret agenda’s.”  or “I don’t have time to lead it.” or “people are too burned out for mid-week meeting with all of their other non-church activities” and so on.

Then I started asking ordinary church members if they would go to a mid-week bible study.  Most said yes and some liked the idea of a later evening study time between 8pm and 10pm rather than programs starting at 6:30 or 7pm.  Late enough for one of the parents to slip out after putting the kids to sleep and not so late to get up early the next morning.  Where it would be a social time as well as a study time, where a light snack and something to drink would be included.  Where it could be in a person’s home or in a room other than the worship space unless the worship space is the only room large enough to gather in.

Has social media, which I don’t use much, replace the need for human interaction?  Am I being old fashioned about how churches were growing 30, 40 years ago?  Is it just me or has the church given up on the basics in how to draw people back to church?  Do you quit bible studies just because only one or two people show up?  Are we so caught up with technology that if we don’t get rewards every 8 seconds, it’s not worth doing?  Has our attention span as Christians been reduce to something less than the attention space of a Gold Fish?

A while ago, there was a weekly bible study started by a minister’s Son.  It was for both men and women and it was not initially organized by the church.  The well planned and prepared bible studies were very successful. The church then sanctioned the study and it went on for years. Suddenly it was cancelled.  The reason wasn’t really clear but there were suggestions like, half the people were from other churches, they were growing inwards and not outwards.  A few people said that the program was self-sustaining but it was not generating any income for the operations of the church.  Seriously! The church was more concerned about profit!

After the first few years the bible study grew to a few hundred people.  Then the bible study stopped growing but it stayed strong for a number of years.  No one was certain if the growth peaked because the room they were meeting in was not large enough for more people, or because there wasn’t any more room for parking or because no one was sharing what they learned.  There was about a 15 to 25% annual turnover of people.  That makes for a very successful program considering some churches have an annual turnover of 50 to 60% for Sunday morning services which suggests there is a lot of spiritual milk being served and little to no spiritual meat being offered any other time through the week to keep people there. This bible study had both milk and meat delivered in the right order as described in the bible.

As it so often happens, this very successful program gets cancelled and another program with good intentions tries to replace it.  The new program fails and now, three years later the church is desperately trying to reboot the Bible study because since it was stopped, overall church attendance and tithing during the Sunday worship services dropped 50%.  Who knew that a bible study program not supported by the church was in fact helping the church indirectly in a huge way.  This church seats over 1000 people.  Just because you can’t see or understand how a successful mid-week bible program works or a weak midweek bible program works, doesn’t mean it won’t have an impact on Sunday worship or church growth.

There has been other events that suggests a strong desire of people interaction.  Should a Monthly men’s prayer breakfast replace weekly bible studies?  What happens to people after getting through an Alpha Meeting program?  Some churches are good at promoting 12 step programs but what is the follow-up to that?  Where do Christians go if they want something more than just milk?  Seriously!  Feed Yourself!  Nowhere does it say that in the Bible but there are many times where God says he will send a shepherd to feed his flock.  Where are the teachers to guide us through the milk to meat or even strong meat?

So if the church is not providing places for people to get something more than just milk, where do people go to seek spiritual meat?  Promise Keepers, Full Gospel Businessmen’s association, Women’s Coffee Break, Woman Alive are just a few of the many great organizations. I get the impression that the attendees are mostly people who want more than just getting milk at church on Sundays.  I think a lot of the people who go to these groups are people who are looking for some meat.  The thing is, can you receive meat in large groups?  The Bible says no.

Heb 5:11 – 14 and 1Co 3:1 -3

Meat is for those becoming mature people.  Mature people become teachers.  Teachers start teaching with milk and later teach the meat until those who grow become mature people.  Maturity is not about age, it is about knowledge, experience and being well grounded in the Word.   Jesus by example gave us the Sermon on the Mount which was mostly milk and later he preached meat to his disciples.  Preachers spread the milk and teachers give the meat.  So where does that happen?  Not by just attending Sunday services.  It is by being involved with follow-up teaching.  People are asking for more teaching but many churches have stopped.  Meanwhile I have discovered that some churches have never stopped and those are the churches that quietly move forward.

It is high time that the midweek bible study gets restored and restored soon if we want to see churches be sustained or even grow in North America.  If the church you’re attending is growing and there is no mid-week meetings, how long will that last when there is a change in leadership?  As an observer of many churches, congregations can survive with teachers and thrive without a pastor.  I’ve seen churches build a brand new facility without a pastor leading the way but a church will fall apart if there are no teachers and where there is no meat being passed on for those to become mature in Christ.

By Joseph De Buglio

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What is the difference between scattering sound and diffusion of sound? Are Diffusers Programmable?

Posted by jdbsound on April 26, 2015

The simple answer is as follows.  Half, quart or third round devices or objects individually just scatter sound.  A single barrel diffuser or tube radiator as I often call them just create a very uneven distribution of sound.  As single units, it gives about the same amount of performance as placing a flat object of the same size and placing at a 15 to 35 degree angle on a wall.

When using barrel diffusers in various sizes and/or in spacing varying from 0 to 30 inches and apply them to all of the walls in a confined space, you are creating a diffusive field.  You’re turning the church walls into a phase coherent sound field – like churches of yester year built between the 1400’s to 1700’s.  When barrel tubes are used as a system you can program them to only manage the acoustical problems you want to get rid of and at the same time create a more desirable sound field like real reverberation that is musical and supportive to congregational singing.

Barrel tubes spaced too far apart just scatter the sound and reduces some bass but does nothing much else.  Instead, you can program the diffusers to manage standing waves, bass buildup, notch a frequency or two and equalize a room.  You can also program them to lower stage noise, manage monitor spill into the audience and improve congregational singing.  They can also be programs to make the sound system perform better.

The software to program barrel diffusers is still in development.  In the meantime, a test room, and a data base of real world testing is the best way to predict the final outcomes.  Try and program a digital EQ to cut 350 hertz 40dB.  It can be done but it sounds awful.  When you program tube radiators to cut 40dB, it sounds sweet.

Joseph De Buglio

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