Church Acoustics

Solving Sound System problems only Acoustics can fix.

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Posts Tagged ‘brick’

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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Stone Mason Gets Passed Over

Posted by jdbsound on April 23, 2015

What does a Stone Mason and a Church Acoustics expert have in common?

http://www.jdbsound.com/art/stone%20mason%20gets%20passed%20over.pdf

Would you know if the best person to do a job was a person from your church or church community?  What if that person was one of the most skilled persons in the world for that service?  Would you know it and would you hire them?  Would you rather hire someone who is worldly, charges huge fees, who give the best sales pitch over someone who is better skilled, who charge less because they want their work to be accessible to any church, not just churches who can afford the big buck and the hype?  Is it possible for a Christian to be the best in world at something else other than being a Christian?  Hope you enjoy the true story of a Stone Mason.

Blessings

Joseph De Buglio

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Acoustics extends the life of Church Restorations

Posted by jdbsound on December 16, 2014

Apparently it is true.  At a recent church meeting where a 160 year old Roman Catholic Church is being restored, the acoustical treatment that I designed will also help to preserve the walls behind it.  The acoustical panel will carry current and future artwork while the walls behind the acoustical system will be sealed.  With no paint going onto the walls, the existing brick and concrete will no longer be degraded by the chemicals in the paint.  This could be the first time where acoustics, Church Iconic Art and preservation are combined together.  According to the restoration company, this approach could double or even triple the cycle between major restorations. The church has already been partially treated for sound acoustics and the improvements have convinced church leaders that the rest of the room should be treated as well.  For this church, no absorption is being added.  Only diffusion is being added to create a phase coherent worship space.  The restoration company thinks that adding acoustical treatment system an affordable way to extend the cost of the restoration and it will give better results for hearing and the sound system performance.

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Kingston Road United Church

Posted by jdbsound on May 25, 2012

Kingston Road United Church.

Location: Kingston Road, Toronto, Ontario Canada

Consulting Date March 2008
Completion Date by Church members – October 2008
Sound System installed by Westbury Sound – December 2008

  1. Seating capacity 500+
  2. Ceiling over 40 ft high
  3. Over 120 Cardboard Tubes custom made order and placed around the room in 8″ 12″ and 16″ half rounds.
  4. Between 120 to 800 hertz removed 18 to 22dB of excess energy.
  5. This change allowed a single speaker system to cover a whole room 134 ft long.
  6. Throw distances from speakers to back wall, 98 ft.
  7. Contractor who installed the system was surprised at how well this sound system worked and how much the room changed.
  8. Contractor suggested delayed speakers before the acoustical treatment was done.

If you wish to see additional photos of this project, visit my Flickr Photo Library.   Use this link to see them.   https://www.flickr.com/photos/jdbsound/sets/72157607243842820/

 

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Finished Churches

Posted by jdbsound on May 22, 2012

Is a New Church or existing Church complete after it opens for worship or after it has the proper acoustics installed?

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