Voice activated multiple microphone electroacoustic amplifier sy

Details Voice activated multiple microphone electroacoustic amplifier sy Voice activated multiple microphone electroacoustic amplifier sy

1992-05-27

1995-03-14

Kuntz, Curtis

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 93, 379395, H04R 300

Patent

active

053982878

ABSTRACT:
An electroacoustic amplifier arrangement comprises a plurality of microphone arrangements each of which includes a microphone coupled to a comparator and coupled via a coupling circuit to a variable gain amplifier. The amplifier arrangement further includes a threshold signal generator. The threshold signal generator has a first and a second input coupled to the input and output, respectively, of the amplifier and is arranged to derive a threshold signal as a function of the signals applied to its two inputs. The output of the threshold signal generator is coupled to a second input of the comparator. The threshold signal generator is arranged to derive a threshold signal as a function of the gain factor adjusted in the amplifier.

REFERENCES:
patent: 4090032 (1978-05-01), Schrader
patent: 4192979 (1980-03-01), Jankowski, Jr.
patent: 4378603 (1983-03-01), Eastmond
patent: 4628526 (1986-12-01), Germer
patent: 4991166 (1991-02-01), Julstrom

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