Public address system

Details Public address system Public address system

1979-07-24

1981-06-23

Konick, Bernard

H04R 302

Patent

active

042752698

ABSTRACT:
A public address system having a microphone, an amplifier which amplifies the output from the microphone and a speaker assembly which receives the output from the amplifier and reproduces a sound, in which the microphone is provided with a transmitter generating an electromagnetic wave and the speaker assembly has two receiving coils disposed perpendicular to each other. The outputs from the receiving coils are used to control the level of an audio signal applied to the speaker assembly and thereby to avoid the occurrence of howling.

REFERENCES:
patent: 3105877 (1963-10-01), Miller et al.
patent: 3922488 (1975-11-01), Gabr

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