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| | Church acoustics,church sound problems - speech intelligibility,reverberation time control, RT60,echo reduction,noise ... |
 | | The rest of the sound, over 99.8% of it, the "indirect sound", misses the ears and continues on, crashing into the walls, floor and carpet, the people, coats, and chairs, the roof and its beams, the walls, windows and doors. |
 | | The amount of indirect sound that is reflected depends on the acoustic nature of the reflecting surface. |
 | | The indirect sound remains in the hall reflecting off of one surface after another, remaining audible to the listeners until it finally disappears, having been absorbed and leaked out of the room. |
| www.church-acoustics.com /aa102.htm (2762 words) |
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