H - Electricity – 04 – R
Patent
H - Electricity
04
R
179/21, 179/5
H04R 3/00 (2006.01) H03G 3/20 (2006.01) H03G 3/34 (2006.01)
Patent
CA 1121736
12.7.1978 PHN 8931 ABSTRACT: A circuit for suppressing pulse-shaped interferences in an audio signal caused by scratches on a gramophone disc, comprising a signal processing section connected between an audio frequency input and an audio frequency output, comprising a noise suppressor having a control input, as well as a control signal section connected between the audio frequency input and the control input, comprising a first threshold selection circuit connected to the audio frequency input for selecting pulse-shaped signals from the audio signal, followed by a second threshold selection circuit for distinguishing the pulse- shaped signals originating from noise signals from those originating from musical signals. - - -
314400
Peek Johannes B. H.
Schmidt Johan M.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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