Frequency response of filter <-> signal mix

1. What is the frequency response of a filter?
2. What is the frequency response of low-pass filter?
3. What is frequency response in signal processing?
4. How to plot frequency response of FIR filter in Matlab?

What is the frequency response of a filter?

The frequency response of a filter is generally represented using a Bode plot, and the filter is characterized by its cutoff frequency and rate of frequency rolloff. In all cases, at the cutoff frequency, the filter attenuates the input power by half or 3 dB.

What is the frequency response of low-pass filter?

The cutoff frequency for a low-pass filter is that frequency at which the output (load) voltage equals 70.7% of the input (source) voltage. Above the cutoff frequency, the output voltage is lower than 70.7% of the input, and vice versa.

What is frequency response in signal processing?

In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and phase of the output as a function of input frequency.

How to plot frequency response of FIR filter in Matlab?

h = freqz(___, f , fs ) returns the frequency response vector h evaluated at the physical frequencies supplied in f . freqz(___) with no output arguments plots the frequency response of the filter.