Comb filter

In signal processing, a comb filter is a filter implemented by adding a delayed version of a signal to itself, causing constructive and destructive interference. The frequency response of a comb filter consists of a series of regularly spaced notches, giving the appearance of a comb.

1. Why is it called a comb filter?
2. How do I find my comb filter?
3. How do I stop my comb filtering?

Why is it called a comb filter?

It got its name from looking like a comb when plotted on a frequency response graph. ... Comb filters are produced when a signal is time delayed and added back to itself. Some frequencies will cancel and others will be reinforced, which can dramatically change the tonal color of the sound.

How do I find my comb filter?

Comb filtering occurs when two or more identical audio signals are mixed together with a slight delay between them. The resulting frequency response graph resembles a comb because frequencies that are in phase sum together, while frequencies that are out of phase cancel.

How do I stop my comb filtering?

How to Avoid Comb Filtering with Podium Mics

1. Beware of Comb Filtering. Comb filtering occurs when two or more open microphones pick up the same sound source and then are mixed together. ...
2. Don't Get Too Close. ...
3. Train Your Users. ...
4. Minimize Plosives. ...
5. Dump the Lows, Dump the Highs.