nothing@0: nothing@0: nothing@0: nothing@0: nothing@0: the mean value of the absolute value of the audio samples amplitude nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: the variance of audio samples amplitude nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: time where signal energy is "concentrated" nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: the base 10 logarithm of the rise time nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: the squared sum of audio samples amplitudes nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: a measure of the number of time the signal value cross the zero axe, averaged over the whole signal nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: the time duration between the signal reached 2% of it maximum value to the time it reaches 80% of its maximum value nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: a measure of the amount of decrease in the signal energy nothing@0: Audio nothing@0: nothing@0: nothing@0: nothing@0: the spectral power mean value. nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the geometric mean for the spectral power values sequence nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the squared sum of spectral power distribution values nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the frequency where the center of mass of the spectral power distribution lies nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: frequency of the maximum magnitude of the spectrum nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the ratio between the energy over 0-100 Hz band and the whole spectrum energy nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the variation of the spectrum around its mean value. nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: The spectral roll-off point is the frequency value so that the 85% of the spectral energy is contained below it nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: the amount of decreasing of the spectral magnitude nothing@0: Spectral nothing@0: nothing@0: nothing@0: nothing@0: sum of the squared spectrum magnitude multiplied by the wave number of the bin nothing@0: Spectral nothing@0: nothing@0: