Method and apparatus for increasing perceived reverberant field

Details Method and apparatus for increasing perceived reverberant field Method and apparatus for increasing perceived reverberant field

1986-04-17

1988-02-23

Isen, Forester W.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 62, 84DIG26, H03G 300

Patent

active

047275812

ABSTRACT:
A method and apparatus for increasing perceived reverberant field diffusion in systems providing electro-acoustic reverberant enhancement to rooms or spaces includes independent modulation of the phase of each individual release loudspeaker channel in response to an effectively random infrasonic modulating signal, independently developed for each channel. Each loudspeaker release channel is fed from an electronic reverberator. The release channel signals are timed to emerge into the room at different times. The amplitude of each channel may also be modulated. In one embodiment, independent devices for generating infrasonic modulating signals have the characteristics of at least two frequencies being present within the range of about five seconds/cycle to about five cycles/second, for supplying control signals for achieving modulation in phase and amplitude.

REFERENCES:
patent: 3157725 (1964-11-01), Wayne
patent: 3535453 (1970-10-01), Veneklasen
patent: 4205579 (1980-06-01), Kakehashi
patent: 4472834 (1984-09-01), Yamamuro et al.
patent: 4509191 (1985-04-01), Miller
patent: 4584701 (1986-04-01), Nakama et al.
Guelke and Broadhurst, "Reverberation Time Control by Direct Feedback", Acustica, vol. 24, pp. 33-41, (1971).
Guelke, "Assisted Reverberation in an Outdoor Environment", Acustica, vol. 30, pp. 335-337.
Towne, Richards & Chaundiere, Inc., "Sound System", McMinnville, 9/1981.

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