a very precise type of equalizer (e.g., a parametric equalizer) which can be used to boost or cut very narrow frequency ranges. Notch filters are used to lessen feedback with microphones or lesson overly resonant notes on acoustic guitars.
A device that rejects signals that have frequencies within a narrow band of audio frequencies and passes all other signals.
A filter that severely attenuates a very narrow band of frequencies. Often used to eliminate steep resonances in an instruments' response, or to get rid of motor hums, feedback, room resonances, and other unwanted sounds that may have been present when a signal was recorded. (WW)
See band eliminator filter.
a very precise type of equalizer (e.g., a parametric equalizer) which can be used to boost or cut very narrow frequency ranges. Notch filters are used to lessen feedback with microphones or lesson overly resonant notes on acoustic guitars.
A special type of cut-only equalizer used to attenuate ( no boosting ) a narrow band of frequencies.