# THE AUDITORY MODELING TOOLBOX

Applies to version: 0.9.8

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# dau1997_preproc - Auditory model from Dau et. al. 1997

## Usage

[outsig, fc] = dau1997_preproc(insig,fs);
[outsig, fc] = dau1997_preproc(insig,fs,...);


## Input parameters

 insig input acoustic signal. fs sampling rate.

dau1997_preproc(insig,fs) computes the internal representation of the signal insig sampled with a frequency of fs Hz.

[outsig,fc,mfc]=dau1997_preproc(...) additionally returns the center frequencies of the filter bank and the center frequencies of the modulation filterbank.

The model consists of the following stages:

1. a gammatone filter bank with 1-erb spaced filtes.
2. an envelope extraction stage done by half-wave rectification followed by low-pass filtering to 1000 Hz.