Time–frequency audio processing exploits the ear’s own spectral analysis structure

Evidence

A common trend in the field of audio is to process the audio signal in the time–frequency domain. In other words, the input audio signal is divided into a number of frequency bands which are processed separately and also depending on time. The aim in such processing is, for example, data compression, audio effects, or the enhancement of audio quality. The benefit of time–frequency processing in such tasks is that the structure of human hearing mechanisms is based on similar time–frequency analysis of the ear canal signals. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2049

Categorization

• XREF: Connects to Chapter 3’s discussion of the ear canal signal time–frequency analysis (Section 3.2.6); echoes how cochlear mechanics perform spectral decomposition discussed in earlier chapters. — connects to: Hearing acts as a spectral analyser extracting quantifiable perceptual metrics from sound — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1572