Present an industry reference to determine whether the current reverberation time is appropriate for the room's intended use. If the reverberation time is too high or too low, how much absorption should be added to the room to meet recommendations?
Added by Mackenzie H.
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For example, the recommended reverberation time for a concert hall may be different from that of a classroom or a recording studio. Show more…
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Let the reverberation time be 1.5 s for an empty hall and 1.3 s when a curtain cloth of 20 m^2 is suspended at the center of the hall. If the dimensions of the hall are 10m x 8m x 6m, calculate the coefficient of absorption of the curtain cloth. What area of the empty hall wall should be covered by the similar curtain cloth so as to reduce the reverberation time to 1.1 s?
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A sound's reverberation time $T$ is the time that it takes for the sound level to decrease by $60 \mathrm{dB}$ (decibels) after the sound has been turned off. Reverberation time varies directly as the volume $V$ of a room and inversely as the sound absorption $A$ of the room. A given sound has a reverberation time of 1.5 sec in a room with a volume of $90 \mathrm{m}^{3}$ and a sound absorption of $9.6 .$ What is the reverberation time of the same sound in a room with a volume of $84 \mathrm{m}^{3}$ and a sound absorption of $10.5 ?$
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