Table 2 Audio features used in soundnail creation.
Feature | Description |
|---|---|
Mean and standard deviations of RMS Energy | The average frequency that will vary for each signal. |
Spectral Centroid | The average frequency of the signal weighted by magnitude. |
Spectral Flux | How much the frequency varies over time. |
50% and 80% Spectral Rolloff | How much of the frequencies are concentrated below a given threshold (50% and 80%). |
6–10 MFCCs | Mel-Frequency Cepstral Coefficients: amplitudes of spectra specified by a set of filters. |