Simulation of reverberation in audio signals

Details Simulation of reverberation in audio signals Simulation of reverberation in audio signals

1976-04-26

1977-05-31

Olms, Douglas W.

179 1J, 179 1G, 84DIG26, H04R 500

Patent

active

040271013

ABSTRACT:
An audio system which achieves a concert hall reverberation effect from a stereo input signal. From two stereo input signals the audio system produces quadraphonic signals suitable for application to four speakers in the pattern of a quadraphonic sound reproduction system. The system applies the stereo input signals to a front pair of speakers substantially without alteration while reverberation is added to the stereo input signals for application to the rear speakers which realistically reproduces the impression of concert hall acoustics in the sound reaching the listener from all four speakers. The reverberation is provided by a channel signal delay scheme in combination with a channel interconnection network which achieves long reverberation times with a high echo density that eliminates objectionable, discrete echo effects.

REFERENCES:
patent: 3094587 (1963-06-01), Dow
patent: 3217080 (1965-11-01), Clark
patent: 3249696 (1966-05-01), Van Sickle
patent: 3281533 (1966-10-01), Pflager
patent: 3710023 (1973-01-01), Greuzard et al.
patent: 3939436 (1976-02-01), Keller

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