Spectrogram of an executable binary [closed]

1. What is a Nfft spectrogram?
2. What does the spectrogram tell you?
3. How do you find the spectrogram in Matlab?

What is a Nfft spectrogram?

The FFT Spectrogram trend, sometimes known as a color density spectral array (CDSA), displays a density spectral array of the frequency and power characteristics of the EEG, derived from a fast Fourier transform (FFT) analysis, as a function of time.

What does the spectrogram tell you?

A spectrogram is a visual way of representing the signal strength, or “loudness”, of a signal over time at various frequencies present in a particular waveform. Not only can one see whether there is more or less energy at, for example, 2 Hz vs 10 Hz, but one can also see how energy levels vary over time.

How do you find the spectrogram in Matlab?

s = spectrogram( x ) returns the Short-Time Fourier Transform (STFT) of the input signal x . Each column of s contains an estimate of the short-term, time-localized frequency content of x . The magnitude squared of s is known as the spectrogram time-frequency representation of x [1].