Abstract
Laws of acoustics known to apply to smaller volumes may not always be taken as true for large auditoriums. For example, computed reverberation times are radically different from actual measured times. In the case of Madison Square Garden, 6,200,000 cubic feet in volume, the calculated time of 35 seconds at 500 cycles contrasts with a measured time of 7.65 seconds. Use of the formula recently proposed by Knudsen reduces the discrepancy, but insufficiently. At 2000 cycles the computed time was 13 seconds; whereas, the measured value was 5.4 seconds. Some general possible causes of the anomaly are suggested.
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