Howtosignalprocessing
What is FFT in DSP?
(Fast Fourier Transform) A computer algorithm used in digital signal processing (DSP) to modify, filter and decode digital audio, video and images. FFTs commonly change the time domain into the frequency domain.
What does the FFT tell us?
The "Fast Fourier Transform" (FFT) is an important measurement method in the science of audio and acoustics measurement. It converts a signal into individual spectral components and thereby provides frequency information about the signal.
Can Arduino perform FFT?
There are of course several ways to implement FFT on an Arduino. You can implement it from scratch or you can use a pre-made library. In this post we'll do the latter.
What does FFT do to a signal?
The FFT algorithm is used to convert a digital signal (x) with length (N) from the time domain into a signal in the frequency domain (X), since the amplitude of vibration is recorded on the basis of its evolution versus the frequency at that the signal appears [40].
