Crestron
Surround Sound
Primer
Peaking EQ Filter
Notch Filters
Notch filters (also called band-reject filters) are used to remove an
unwanted frequency from a signal, while affecting all other frequencies
as little as possible.
An example of the use of a notch filter is with an audio program that
has been contaminated by 60 Hz powerline hum. A notch filter with a
center frequency of 60 Hz can remove the hum while having little
effect on the overall audio signal. A notch filter ideally suppresses a
single frequency component (the notch frequency) within the input
signal, or a narrow symmetric window around the notch frequency.
Primer – DOC. 6122
Surround Sound
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