
Acoustics and the Gospel
Posted by jdbsound on May 21, 2019

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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 the minimum heights. Building new churches with lower ceiling heights degrades speech and congregational singing and costs 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.
Posted in Church Acoustics, Educational Must Read Articles | Tagged: christianity, Church acoustics, Church Sound Systems, churches, sound systems | Comments Off on Really Useful Charts and Helps
Saving Souls – Priceless
Posted by jdbsound on May 16, 2019
What are your church priorities? Fixing the acoustics of any church is affordable. A person will spend over a thousand dollars to help with their hearing. Sound equipment tools for worship are affordable and do a lot of work. Few people fuss over how an audio system looks after it is installed. When it works, it looks great. The same is true with acoustics. If it works, it looks and sounds good. If it doesn’t work, it has to look amazing because acoustics that doesn’t fix all of your churches needs is nothing more than wall furniture. What’s on your church walls that helps preach the Gospel?
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Was Solomon’s Temple for real? If it was, how would it sound?
Posted by jdbsound on May 7, 2019

Was Solomon’s Temple a fairy tale? I don’t think so. I think Solomon’s Temple was as real as touching your own skin. Why? Solomon’s Temple was designed over 3,000 years ago. When you study the sound quality of the two rooms, it describes spaces that were purpose built for specific functions. The room that reflects modern day acoustics is the Holy Place or Sanctuary as we like to call it today. How can the design of a room from 3000 years ago be so good if it was never built or a fairy tale or myth? Do you think that King David or Solomon knew anything about acoustics back then? Did God tell King David and Solomon’s how to design rooms where hearing would be easy or difficult? Could the acoustics of the Holy Room reflect todays demanding needs of sound for worship? Yes. Absolutely!
The only difference between what a traditional worship space and a contemporary worship space would be the need for is adding carpeted floors and padded seating for worship team lead services. Churches with similar dimensions and shape as Solomon’s Temple have a way better worship experience over churches that have other room shapes. That is not to say you can’t have a good worship experience in other room shapes, but if you can remember your best worship experience in other rooms with good acoustical sound management, it is way better when the room is a rectangle. This only happens when the room is twice as long as it is wide, and with a very high ceiling that is 75% of the rooms length. With those dimensions and with the same type of acoustical treatment system as used in Solomon’s temple, regardless of your worship style, the only experience better than that would be in Heaven. And yes, the carvings of Cherub, Palm Trees and open flowers was actually an acoustical system designed by God. The updated version of it work great in modern churches today.
The modified version use half round shapes like the Palm tree. An affordable way to fix any church is with cardboard tubes. Such tubes using a water based glue meets fire codes in almost any place around the world, and does as good of a job as the carvings in Solomon’s Temple. For churches that have little to no money to spare, this is the cheapest way to breath life into all of those existing churches out there regardless of their room shapes. This is the only acoustical system that improves congregational singing (even is dead rooms), and doubles the loudness of the sound systems performance without distortion and without buying more equipment. (assuming that the equipment you already have is up to the task of performing at these levels in the first place.)
Now when I say doubles loudness of the sound system, it means that if you total the components of your speaker system, amplifiers and processors, and multiply the equipment 10 times, that is doubling the loudness. Remember that doubling the equipment or doubling the power only gives you a 3dB increase, but it take 10 times the power to double the loudness without distortion which is equal to 10dB. In most churches, an acoustical fix such as this has a one time costs of about $5.00 per seat. A typical speaker system for a church cost around $30.00 per seat and up. To get the same performance through sound equipment as a room treated with Cardboard Tubes, the speaker system goes up to $300.00 per seat or ten times the cost. If you do a reality check, you would actually have to spend more because you are still fighting the room to keep the sound distortion free. Even at $500.00 per seat, you may not be able to get double the loudness without distortion. To apply this kind of acoustical system as in a church as in Solomon’s temple, it lowers the cost of a sound system while increasing it’s performance. There is no other acoustical system that can do that.
Now Solomon’s Temple was built over 3000 years ago. How did they know how to do acoustical treatment that works in churches today? How is it that something designed 3000 years ago is so sound system friendly? The reality is, God inspired it’s design. Many Christians believe that the Bible is sufficient in all things and that should including church design and acoustics. Shouldn’t we be following what the Bible says and teaches, even in worship space design? (Ecclesiastes 1:9) The thing that hath been, it is that which shall be; and that which is done is that which shall be done: and there is no new thing under the sun. If there is nothing new under the sun, then why do churches keep trying to design something original or different when there is nothing better out there? Worse yet, why don’t churches know that for preaching the Gospel there is no better room than a room with the dimension ratio’s as in Solomon’s Temple? Furthermore, why are so many churches determine to solve acoustical problems with electronics when they don’t have to?
Solomon’s temple was small. It could only seat around 150 people if used as a church today. Apparently, you can scale the room up to any size and have the same performance results. Why hasn’t the church community figured this out? (Why aren’t Synagogues built this way either?) From my own experience, if you use these dimensions, such a room will sound amazing as long is the walls have the right shapes added on them. At the same time this room will awful if you don’t include the same type of acoustical system as used in Solomon’s Temple. Please notice that I use the term “System”, and not “Treatment.” When you call it a system it is about a planned acoustical space or a system that treats the whole room. When you call it a treatment, it is as if the acoustical products are used as an after-thought. Such acoustical products are used only do spot treatments and they provide minor room fixes, and cost so much more expensive.
The most important roll of a House of Worship is to preach the Gospel. No other room shape, dimensions and wall finishing’s does it better. Why would any church design the most important room with a lesser goal? The foyer, fellowship halls, classrooms, office and the shell of the building can be any shape you want but the worship space should be designed for the sole purposes of teaching the Gospel and for a full worship experience. All other room shapes and treatments, regardless of the sound system design and equipment fall short in meeting the standard found in Solomon’s temple.
If you believe as I do that the Bible is sufficient, then it should be sufficient in the design on your next church sanctuary. Oh, didn’t anyone tell you? A room built to Solomon’s dimensions costs less to build, heat and cool and maintain. Solomon’s Temple is a fine example of “Nothing new under the sun.”
For the 400 plus churches that already have such an acoustical system, what further proof do you need that Solomon’s temple was real? If you want to take it a step further, since science cannot predict how this acoustical system works, a system that you have to apply in faith, does that constitute a miracle?
Posted in Church Acoustics, Educational Must Read Articles | Tagged: acoustics, All types of worship, Church acoustics, Church Sound Systems, Holy of Holies, Holy Place, King David Design, Palm Tree Cherubs open flowers, Palm Trees, sanctuary, Solomon's Temple, Synagogues, Temple Mount New, Third Temple | Comments Off on Was Solomon’s Temple for real? If it was, how would it sound?
The Best Worship Experiences
Posted by jdbsound on March 25, 2019

The organist of this church pulled every stop, pushed the peddles all the way down and the he had trouble hearing the organ just 20 feet away. At the back of the church at the sound booth, the organ was barely audible. I used a SPL meter, put it about 3 feet over my head at the back of the church and the congregational singing peaked at 105dB several time during a familiar hymn. There was no one behind us. There have been other times at other church where I designed or upgraded their acoustics were the congregation is singing acapella and they were peaking at 106dB. The good news is, singing like that doesn’t hurt your hearing.
Posted in Church Acoustics | Tagged: Acoustical Blue print, acoustical management systems, acoustics, Bible, Church, Church acoustics, Church Sound Systems, house of worship, Passive acoustics, Preachers, room acoustics, sanctuary, Teachers | Comments Off on The Best Worship Experiences
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

Posted in Church Acoustics, Church Sound Systems, Rants | Tagged: Bible, christianity, Church, Church acoustics, church growth, Church Sound Systems, intelligibility | Comments Off on Churches are Tools
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.
https://www.jdbsound.com/art/church%20ceiling%20height%20chart.pdf

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 if 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 horizontal standing waves. 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 for 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, we will have our reward here on earth. The sanctuary of a church is a battlefield where the hearts, minds, and souls of people can be added or subtracted 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 has 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.
Posted in Church Acoustics, Educational Must Read Articles | Tagged: Acoustical Blue print, acoustical management systems, acoustics, aesthetics, Architect, attendance, Audio Frequency, Bass, Bass Traps, ceilings, christianity, Church, Church acoustics, church growth, congregational singing, leadership, religion, Sound, Standing waves, Teachers, technology, worship | 8 Comments »


