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What is "Comb Filter"?

Comb Filter
The special coloration of a sound that occurs when combining a signal with a delayed replica of itself is called comb filtering. This is because the frequency response looks like a comb with peaks and dips.

It can occur when two or more microphones at various distances from the sound source are open and a level difference between the output of the microphones is less than 10 dB.

10 IMPORTANT FACTS ABOUT ACOUSTICS FOR MICROPHONE USERS

If you want to get the best out of your microphones, it is a good idea to have some knowledge of acoustics. This article takes you through 10 of the most important terms and facts.

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THE BASICS ABOUT COMB FILTERING (AND HOW TO AVOID IT)

Comb filtering occurs when a sound adds to itself within a short time interval. This interval typically ranges from less than one ms to approximately 25 ms. 

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