THE AUDITORY MODELING TOOLBOX

Applies to version: 1.5.0

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eurich2022_processing - Binaural processing stage of the Eurich et al. (2022) model

Usage:

[out,mpar] = eurich2022_processing(stimulus,mpar)

Input parameters:

stim Matrix containing stimulus (columns 1 and 2) and template (columns 3 and 4)
mpar
Structure with the following model parameters:
  • fs: sampling frequency of model (in Hz)
  • Filters_per_ERB_aud: spacing of peripheral filter central frequencies (in ERB)
  • GT_bandwidth_factor: factor of gammatone filter bandwidth relative to "standard" (ERB = 79 Hz at fc = 500 Hz)
  • GT_lowest_center_frequency: lower bound of gammatone filterbank (in Hz)
  • GT_highest_center_frequency: higher bound of gammatone filterbank (in Hz)
  • GT_fix_center_frequency: fixed center frequency of one of the filters ((in Hz)
  • GT_filterorder: filter order of each of the gammatone filters
  • interference_sigma: standard deviation of the Gaussian window in the across-frequency incoherence interference
  • iKernelThresh: threshold above which a value of the Gaussian filter window is used
  • rho_max upper limit of encoded interaural coherence (i.e. internal noise)
  • monaural_internal_noise_sigma: standard deviation of the Gaussian level-dependent internal noise of the monaural feature
  • binaural_internal_noise_sigma: standard deviation of the Gaussian internal noise of the binaural feature
  • target_channel: index of the channel to be selected for processing in eurich2022_decision

Output parameters:

out
Matrix with four columns:
  • binaural features of the reference signal (complex correlation coefficient gamma)
  • monaural feature of the reference signal (DC power of 500 Hz band)
  • binaural features of the test signal (complex correlation coefficient gamma)
  • monaural feature of the test signal (DC power of 500 Hz band)
mpar Updated structure with model parameters

References:

B. Eurich, J. Encke, S. D. Ewert, and M. Dietz. Lower interaural coherence in off-signal bands impairs binaural detection. The Journal of the Acoustical Society of America, 151(6):3927--3936, 06 2022. [ DOI | .pdf ]

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