THE AUDITORY MODELING TOOLBOX

Applies to version: 0.9.9

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takanen2013_lso - Model of the lateral superior olive

Usage

output = takanen2013_lso(ipsilateral, contralateral, fs, fc);

Input parameters

ipsilateral The ipsilateral "where" stream output from the model of the periphery
contralateral The contralateral "where" stream output from the model of the periphery
fs sampling rate
fc characteristic frequencies

Output parameters

output Spatial cues for separate narrow bandwidths

This function models the lateral superior olive (LSO) by processing the output of the periphery model with the following steps:

  1. First-order lowpass filter is applied to both the ipsilateral and contralateral sides, and the contralateral side is delayed
  2. The output is saturated at a certain dB level and limited signals.
  3. Weighted moving average filters with a short and longer time constant are applied, the latter only below 1 kHz in order to slow the response

References:

V. Pulkki and T. Hirvonen. Functional count-comparison model for binaural decoding. Acta Acustica united with Acustica, 95(5):883 - 900, Sept./Oct. 2009.

M. Takanen, O. Santala, and V. Pulkki. Visualization of functional count-comparison-based binaural auditory model output. Hearing research, 309:147-163, 2014. PMID: 24513586. [ DOI ]

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