# THE AUDITORY MODELING TOOLBOX

Applies to version: 1.1.0

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# EWERT2000 - - Modulation filterbank (based on EPSM)

## Usage

[fcs,powers] = ewert2000(data,fs)


## Input parameters

 data Frequencies of the data, starting from f = 0 data Powerspectrum data to be filtered. fcs Centre frequencies of the filters powers Integrated power at the output of each filter Wcf Matrix containing the frequency-domain squared transfer function fig flag for plotting fitler transferfunctions 1 = yes, 0 = no plotting

## Output parameters

 fcs centre frequencies of the filters powers filter coefficients

## Description

[fcs powers] = ewert2000(data,fig,fs) computes the EPSM-filterbank as presented by Ewert & Dau 2000, without the additional lowpass filter with a cut-off at 150 Hz. This implementation consists of a lowpass filter with a cutoff at 1 Hz, in parallel with 6 bandpass filters with octave spacing. the Center-frequencies of the bandpass filters are lower than the original from Ewert & Dau (2000). In each of the filters data is integrated within the pass-band of the filter to give the power within that filter.

## References:

S. Ewert and T. Dau. Characterizing frequency selectivity for envelope fluctuations. J. Acoust. Soc. Am., 108(3):1181--1196, 2000.