Device to be used for changing the acoustic properties of a room

Details Device to be used for changing the acoustic properties of a room Device to be used for changing the acoustic properties of a room

1994-09-30

1996-09-24

Isen, Forester W.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 96, 381 71, G10K 1116

Patent

active

055598919

ABSTRACT:
The invention relates to a device to be used for changing the acoustic properties of a room, comprising a pressure transducer (1), a loudspeaker (2) and an electronic control circuit (3) adapted to generate, in response to pressure changes in the room, an electrical signal that serves to cancel the pressure change detected by the pressure transducer (1) when it is reproduced through the loudspeaker. For improving the properties of the room also with respect to reverberation, the device of the invention further includes an ambience generator (4) adapted to receive an electrical signal proportional to the sound present in the room and to generate, in response to said signal, a signal which produces an acoustic field containing early reflections and reverberation in the room when reproduced through the loudspeaker (2).

REFERENCES:
patent: 4712247 (1987-12-01), Swarte
patent: 4899387 (1990-02-01), Pass
patent: 5025472 (1991-06-01), Shimizu et al.
patent: 5172416 (1992-12-01), Allie et al.
patent: 5182774 (1993-01-01), Bourk
patent: 5195140 (1993-03-01), Kudo et al.
"Assisted Resonance", G. Berry et al., Journal of the Audio Engineering Society, Apr. 1975, vol. 24, No. 3, pp. 171-176.
"Explosive Potential", DAK Catalog, Fall 1984, pp. 62 and 17.

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