The Auditory Modeling Toolbox

Applies to version: 0.10.0

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takanen2013_periphery - Process the input through the model of periphery

Usage

periphOutput = takanen2013_periphery(insig,fs,outputPlot);
periphOutput = takanen2013_periphery(insig,fs);

Input parameters

insig binaural input signal to be processed. Optionally, the output of the cochlear model by Verhulst et. al. 2012 can be used as well
fs sampling rate
outputPlot boolean value that defines whether the periphery model output at different frequency bands are plotted

Output parameters

periphOutput

Structure consisting of the following elements

periphOutput.left
Left ear "where" stream output
periphOutput.right
Right ear "where" stream output
periphOutput.fc
Characteristic frequencies
periphOutput.ventralLeft
Left hemisphere "what" stream output
periphOutput.ventralLeft
Right hemisphere "what" stream output

This function processes the binaural input signal through the model of periphery presented by Takanen, Santala, Pulkki 2013, the model which consists of a nonlinear time-domain model of cochlea and model of cochlear nucleus. The processing contains the following steps:

  1. the binaural input signal is processed with the nonlinear time- domain model of cochlea by Verhulst et. al. 2013 to obtain the velocity of basilar membrane movement at different positions
  2. the obtained velocity information is half-wave rectified
  3. the half-waves are replaced with Gaussian pulses centered around the local maxima of the half-waves
  4. the frequency-dependent delays of the cochlea model are compensated

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