Stft - Alternative way of visualising [closed]

1. What is the difference between FFT and STFT?
2. What is a Nfft spectrogram?
3. Why would we use a STFT spectrogram for Analysing human speech?
4. What is FFT length in STFT?

What is the difference between FFT and STFT?

FFT has a resolution of 2048 lines, Blackman window, and 50% overlap and STFT also has Block size 2048, FFT size 16K, Blackman window used, and 50% overlap. As we can see, STFT performs better with the same block size (but more calculated lines). We improved frequency resolution for the same amount of scooped data.

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.

Why would we use a STFT spectrogram for Analysing human speech?

The STFT is one of the most frequently used tools in speech analysis and processing. It describes the evolution of frequency components over time. Like the spectrum itself, one of the benefits of STFTs is that its parameters have a physical and intuitive interpretation.

What is FFT length in STFT?

512 (default) | positive integer. FFT length, specified as a positive integer. This property determines the length of the STFT output (number of rows).