发明名称 NOISE REDUCTION CIRCUIT FOR TELEPHONES
摘要 A system for processing audio signals in two channels, wherein each channel includes a plurality of band pass filters for dividing the signal in each channel into a plurality of bands and a plurality of variable gain amplifiers coupled one each to a band pass filter. Control logic coupled to the variable gain amplifiers prevents the signals in adjacent bands within a channel from being attenuated simultaneously. The control logic attenuates the signals in one channel in accordance with the signal in the corresponding bands in the other channel. In some circumstances, the signal in the band in the one channel is attenuated.
申请公布号 US2001040963(A1) 申请公布日期 2001.11.15
申请号 US19990326864 申请日期 1999.06.07
申请人 THOMASSON SAMUEL L. 发明人 THOMASSON SAMUEL L.
分类号 H04M9/08;(IPC1-7):H04M1/76 主分类号 H04M9/08
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