Noise reduction device
专利汇可以提供Noise reduction device专利检索，专利查询，专利分析的服务。并且PURPOSE:To make it possible to process signals with good fidelity by preventing crosstalk between divided bands by transmitting signals with the band divided into the unused band outside the audible band of a tape recorder, etc. CONSTITUTION:A musical-sound signal from terminal 1 is band-divided by LPF16 and BPF26; the output component of LPF16 after logarithmic compressing process 3 is shifted into a frequency band of 20 to 40KHz through FM 29 and the output of BPF26 is logarithmic-compressing-processed 20 into a component below 20kHz, so that the both will be added together and recorded on magnetic tape 15. The playback output of tape 15 is supplied to BPF27 of 20 to 40KHz and BPF28 of the same characteristics as BPF26 and the output of BPF27 is FM-demodulated 31 and expansion-processed 4 before being added 25 to the component obtained by expansion-processing 21 the output of BPF28. As a result, the modulation of a noise level by the musical-sound signal is limited into the respective band, so that a large breathing noise can be reduced.，下面是Noise reduction device专利的具体信息内容。
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