Comb filter dsp

1. What is comb filter in DSP?
2. What is a comb filter used for?
3. How do you calculate comb filter?
4. When can comb filtering occur?

What is comb filter in DSP?

Comb Filters – a filter designed to reject a specific frequency and all its harmonics. From: DSP for Embedded and Real-Time Systems, 2012.

What is a comb filter used for?

Comb filters are employed in a variety of signal processing applications, including: Cascaded integrator–comb (CIC) filters, commonly used for anti-aliasing during interpolation and decimation operations that change the sample rate of a discrete-time system.

How do you calculate comb filter?

The fundamental frequency of a comb filter is the inverse of the delay time. That is, the frequency of the first peak in a comb filter (constructive interference) is equal to 1 divided by the difference in arrival time between the microphones (the delay time), in seconds.

When can comb filtering occur?

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.