Voice Band Notch Filter
ETS VNF-4 Four Channel Voice Band Notch Filter Interface
The VNF-4 from ETS is a four-channel voice band notch filter, interface. Four channel, low-cost background noise reduction module for use with ETS microphones and DVRs, etc. Provides boost of frequencies in the human voice band (1.7Khz) and10db per octave attenuation on both sides of the bandpass....
ETS VNF-1 Single Channel Voice Band Notch Filter, Interface
Single channel, low-cost background noise reduction module for use with ETS microphones and a DVR, I/P camera, etc. Provides boost of frequencies in the human voice band (1.7Khz) and 10db per octave attenuation on both sides of the bandpass. The result is significantly reduced background noise and...
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