# Questions tagged [frequency]

Frequency in signal processing is the number of cycles (of the signal) per second.

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### Frequencies calculation of discrete signal in frequency domain

I have some misunderstanding in definition of frequency resolution of the signal. Here it is assumed that the resolution is: $$\hat{f_k}=f_{signal}\cdot T_{sampling}$$ (which is just relation of ...
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### What should be a sampling frequency, that we could add two signals?

I got a code in Matlab: ...
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### Why is the error of the frequency estimation dependent on SNR?

Last time, I asked how to estimate the error of the frequency estimation (1) (I want to determine the error as in $f=0.92 \pm 0.013 \; Hz$). I'm analyzing a sample of a continuous signal that was ...
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### How to find the max frequency at a certain db in a fft signal

I am processing some audio files and I would like to find out the maximum frequency in the spectrum (fft) given a certain magnitude range (in may case: maximum magnitude to -60db). How can I achieve ...
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