Electro-acoustic system having a variable reflection/absorption

Details Electro-acoustic system having a variable reflection/absorption Electro-acoustic system having a variable reflection/absorption

1985-03-27

1987-12-08

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 59, 381105, H04R 300

Patent

active

047122471

ABSTRACT:
An electro-acoustic arrangement comprises an amplifier (4) having a first input terminal (5), a second input terminal (5'), a first output terminal (3), a second output terminal (3'), and a series arrangement of a first impedance (1) and an electro-acoustic transducer unit (2) is coupled to the output terminals (3, 3'). At least the first impedance (1) is also coupled to the input terminals (5, 5') of the amplifier. The gain factor (A) of the amplifier for a signal applied to the first and second input terminals (5) and/or the impedance value Z.sub.1 of the first impedance may be variable. This arrangement influences the acoustic properties of a space, such as the reverberation time. By means of such an arrangement (FIG. 1) and in particular by means of a system (FIG. 9) comprising a plurality of such arrangements, the acoustic properties of a space, such as the reverberation time, can be influenced.

REFERENCES:
patent: 3647969 (1972-03-01), Korn
patent: 3872247 (1975-03-01), Saville et al.
patent: 4387270 (1983-06-01), Sakano et al.

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