Reverberation imparting device

Details Reverberation imparting device Reverberation imparting device

1988-05-25

1991-06-18

Isen, Forester W.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 83, 84DIG26, H03G 300

Patent

active

050254723

ABSTRACT:
A reverberation imparting device for electro-acoustically enhancing reverberation in acoustic space comprises a microphone disposed in the acoustic space, a loudspeaker disposed in the acoustic space for diffusing the sound picked up by the microphone, and feedback means comprising a signal processing circuit for electrically processing an electric signal corresponding to the sound picked up by the microphone, an output of the signal processing circuit being supplied to the loudspeaker. The microphone, feedback means and loudspeaker form a feedback loop. The signal processing circuit comprises a circuit for subjecting impulse responses of finite length to a convolution operation. Time axis of reflected sounds is extended and extension of reverberation time thereby is realized without depending upon loop gain. Density of reflected sounds is increased by subjecting impulse responses of finite length to a convolution operation whereby separation of reflected sounds is prevented.

REFERENCES:
patent: 3535453 (1970-10-01), Veneklasen
patent: 4066842 (1978-01-01), Allen
patent: 4578543 (1986-03-01), Le Bourlot et al.
patent: 4609787 (1986-09-01), Horna
patent: 4706291 (1987-11-01), Kakubo et al.

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