## anonymous 4 years ago What is the difference between a band reject filter and a notch filter?

1. anonymous

In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of a band-pass filter. A notch filter is a band-stop filter with a narrow stopband (high Q factor).

2. anonymous

on what parameters Q relies upon? and is it true that a notch filter is a limiting case of band stop filter?

3. anonymous

$Q=\omega0/\beta$

4. anonymous

where $\omega0$ is the central frequency

5. anonymous

and beta is the band width

6. anonymous

band reject filter as the name suggests .. rejects a band and notch filter is used to select a particular frequency and nt a band