THE AUDITORY MODELING TOOLBOX

Applies to version: 1.2.0

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DAU1997 - Linear filtering for monaural masking (improved)

Usage

[outsig, fc] = dau1997(insig,fs);
[outsig, fc] = dau1997(insig,fs,...);

Input parameters

insig input acoustic signal.
fs sampling rate.

Output parameters

outsig output signal
fc center frequencies [Hz]

Description

dau1997(insig,fs) computes the internal representation of the signal insig sampled with a frequency of fs Hz.

[outsig,fc,mfc]=dau1997(...) 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.
  3. an adaptation stage modelling nerve adaptation by a cascade of 5 loops.
  4. a modulation filterbank

Any of the optinal parameters for auditoryfilterbank, ihcenvelope and adaptloop may be optionally specified for this function. They will be passed to the corresponding functions.

References:

T. Dau, B. Kollmeier, and A. Kohlrausch. Modeling auditory processing of amplitude modulation. I. Detection and masking with narrow-band carriers. J. Acoust. Soc. Am., 102:2892--2905, 1997a.

T. Dau, B. Kollmeier, and A. Kohlrausch. Modeling auditory processing of amplitude modulation. II. Spectral and temporal integration. J. Acoust. Soc. Am., 102:2906--2919, 1997b.