Table 4 Audio-inspired features for tactile data processing.
From: Tactile, Audio, and Visual Dataset During Bare Finger Interaction with Textured Surfaces
Feature | Simplified Meaning |
|---|---|
MFCCs | Mel-frequency cepstral coefficients: Extracts the power spectrum of bins of frequencies. The bins are spaced according to the MEL perceptual scale. |
RMS Energy | Root mean square energy of the signal. |
Pitch | The perceived frequency of the signal. |
Spectral Centroid | The centre of mass of the frequency spectrum. |
Spectral Bandwidth | The width of the frequency spectrum. |
Zero Crossing Rate | The rate at which the signal changes sign. |
Spectral Roll-off | The frequency below which a certain percentage of the signal’s energy is contained. |
