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The Effect of Reinforcement System Regeneration on Gain and Reverberation Decay

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Classical techniques for predicting sound distribution and decay in a room assume no sound regeneration in the system. The presence of even modest amounts of regeneration can result in sound levels several decibels above those predicted by feedforward analysis only, and times on the order of a second for 60 dB of loop decay after the source of the sound has been shut off. Computation and measurement methods are given.

JAES Volume 33 Issue 11 pp. 872-877; November 1985
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AES - Audio Engineering Society