Availability: In stock.
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 band pass. The result is significantly reduced background noise and increased intelligibility of speech.