Amplifier arrangement for acoustic signals, provided with...

Details Amplifier arrangement for acoustic signals, provided with... Amplifier arrangement for acoustic signals, provided with...

H - Electricity

03

F

330/13, 179/5

H03F 1/26 (2006.01) H03G 3/20 (2006.01) H03G 3/32 (2006.01) H04R 25/00 (2006.01)

Patent

CA 1107355

ABSTRACT: An amplifier arrangement for acoustic signals provided with means for suppressing undesired signals, comprising a high-pass filter which separates a part of the signal to be amplified for obtaining a control signal with which the gain of the arrangement is reduced, the output of the high-pass filter being connected to a periodicity detector which discriminates between a signal with a regular periodicity and those with an irregular character, such as noise or speech, the said control signal being derived from the output of the periodicity detector. Preferably the periodicity detector comprises a single peak detector. Thus it is possible to prevent acoustic feedback in an amplifier system in a very rapid manner. -13-

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