Short-time Fourier analysis converts signals into spectrograms via windowed transforms

Evidence

A time–frequency representation is obtained, for example, by applying a window, such as a 20- ms Hamming window, to a portion of a signal, taking the Fourier transform, and then moving to the next portion of the signal and repeating the procedure. This spectral sampling interval, called the hop size, is typically about 10 ms for analysing speech and other audio signals. Such a frame-based analysis of spectra is called short-time Fourier analysis, and its graphical representation is called a spectrogram. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 392

Categorization

• DEFINE: Defines hop size, short-time Fourier analysis, and spectrogram in one compact passage.
• corroborated: 3 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 392