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Table 2 Acoustic features

From: Acoustic differences between healthy and depressed people: a cross-situation study

Name of feature Explanation
Loudness subjective perception of sound volume
Fundamental frequency (F0) lowest frequency of a periodic waveform
F0 envelope the envelope of the smoothed F0 contour
Zero-crossing rate (zcr) the rate of sign-changes along a signal
Voicing probability (vp) the rate of voicing in one speech
Mel-frequency cepstrum coefficients (MFCCs) vocal tract changes in a certain voice spectral energy
Line Spectral Pairs (LSPs) quantization of linear prediction coefficients (LPC) for transmission over a channel