# THE AUDITORY MODELING TOOLBOX

Applies to version: 0.9.8

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# dietz2011_filterbank - filterbank of Dietz 2011 binaural model

## Usage

[...] = dietz2011_filterbank(insig,fs,fc);


## Input parameters

 insig binaural signal for which values should be calculated fs sampling rate (Hz) fc center frequencies of gammatone filterbank

## Output parameters

 outsig_fine output signal of fine structure filter fc_fine center frequencies processed with fine structure filter outsig_env output signal of envelope filter fc_env center frequencies processed with modulation filter outsig_ild output signal of ILD filter

dietz2011_filterbank(insig,fs,fc) filters all frequency channels of insig with a modulation filterbank consisting of three filters. One centered at the center frequencies for the fine structure of the signals. One centered at a fixed frequency of 135 Hz for the envelope of the signals. And one a lowpass filter with a cutoff frequency of 30 Hz for the calculation of the interaural level difference.

dietz2011_filterbank accepts the following optional parameters:

 'filter_order',fo Filter order for the two gammatone filter used for the fine structure and envelope of the modulation filter bank. The default value is 2. 'filter_attenuation_db',fadb Filter attenuation for the two gammatone filter used for the fine structure and envelope of the modulation filter bank. The default value is 10. 'fine_filter_finesse',fff Filter finesse (determines the bandwidth with fc/finesse) for the fine structure gammatone filter. The defulat value is 3. 'mod_center_frequency_hz',mcf_hz Center frequency of the gammatone envelope filter. The default value is 135. 'mod_filter_finesse',mff Filter finesse (determines the bandwidth with fc/finesse) for the envelope gammatone filter. The defulat value is 8. 'level_filter_cutoff_hz',lfc_hz Cutoff frequency off the low pass filter used for ILD calculation. The default value is 30. 'level_filter_order',lforder Order of low pass filter for the ILD calculation. The default value is 2.

## References:

M. Dietz, S. D. Ewert, and V. Hohmann. Auditory model based direction estimation of concurrent speakers from binaural signals. Speech Communication, 53(5):592-605, 2011. [ DOI | http ]