Electric reverberation apparatus

Details Electric reverberation apparatus Electric reverberation apparatus

1978-04-21

1980-01-01

Claffy, Kathleen H.

H04R 300

Patent

active

041818202

ABSTRACT:
An electronic reverberation apparatus, for producing artificial reverberation on a purely electronic basis with a digital computer, comprises a plurality of loops having different delay times and adapted to form sound repetitions of diminishing intensity. Some of the loops have short delay times and have an all-pass characteristic. Others of the loops have long delay times. The loops are provided with tappings each of which has a particular delay time associated with it. The delay times of the tappings themselves and the sums, differences and quotients of these delay times are in a non-harmonic relationship to one another. Each tapping feeds a corresponding damping element whereby the output from each successive tapping is reduced such that the reduction in energy corresponds to an exponential function, and a delayed and repeated combination of unreverberated input signals is fed to an output from the loop circuit. For naturalness the output of each reverberation delay unit is randomly damped.

REFERENCES:
patent: 3217080 (1965-11-01), Clark
patent: 4005268 (1977-01-01), Canell et al.
Schroeder, M., "Natural Sounding Artificial Reverberation", JAES, vol. 10 Nr. 3, Jul. 1962.

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