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Posts Tagged ‘Salvation’

A New Acoustical Tool for the Acoustic ToolBox.

Posted by jdbsound on October 3, 2023


Performance Space Acoustics is fraught with many myths, misinformation, and limitations.  It is pure science, but its complexity makes it appear part of the mystical arts, brainwashing most into believing good acoustics is not possible or repeatable.  What could be further from the truth?  There are rules for acoustics.  Follow them, and success is assured every time.  Break any rule, and the results create an endless and costly cycle of experiments to correct the error.  It doesn’t have to be that way, but it is human nature for people to believe that the rules don’t apply to them.  The burning question is, which is greater, the laws of physics or human nature?  The answer is simple.  The laws of nature cannot be broken, and no amount of human cleverness can change that. 

It has often been said and proven that acoustical problems come in layers.  The most common and misunderstood layer has to do with excess bass.  This layer is often misunderstood in acoustical measurements due to the sound-masking effects of bass energy.  Most experts are not trained…

Download the rest of the document here. The New Acoustical Toolbox.

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Natural Acoustical Amplifiers

Posted by jdbsound on May 22, 2012


Walls are amplifiers of sound.
Outdoors – when you double the energy with amplifiers or speakers the sound levels increases 3dB.
Indoors – when you double the energy with amplifiers or speakers the sound level of certain frequencies can increase up to 9dB or cancel the sound 100%.

Example Below:

Armeanian Pentecotal Church Montreal

Before acoustical treatment, there would be 1dB loss at 10 ft and 2dB loss at 40 ft. without the sound system.

After acoustical treatment, there is 4dB loss at 10ft and 8dB loss at 40 ft. without the sound system.  Also, intelligibility changed from 79% at 40 ft to 92% after acoustical changes.  When you add the sound system the coverage with +/-3dB

This was in the middle of the acoustical transformation

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