# THE AUDITORY MODELING TOOLBOX

Applies to version: 0.9.8

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# takanen2013_contracomparison - Enhanance the contrast between the hemispheres

## Usage

[activMap gainMtrx]= takanen2013_contracomparison(thetaL,thetaR,levels,energyL,energyR,fs,printFigs);


## Input parameters

 theraL "where" cue of the left hemisphere thetaR "where" cue of the right hemisphere levels vector specifying the left/right location energyL "what" cue of the left hemisphere energyR "what" cue of the right hemisphere fs sampling rate printFigs boolean value describing whether the computations are illustrated or not

## Output parameters

 activMap Matrix that describes in which of the six frequency ranges there is activation on a given location on map at a specific time instant gainMtrx Matrix that describes the signal level dependent gains for the different activation values on the activity map

The contralateral comparison is used to control the strengths of the images on the binaural activity map. More specifically, the where cues define positions of the images and an inhibitory coefficient is used to reduce the strength of the image more closer to the center. Additionally, inherent delays are introduced to the inhibition to emulate the binaural adaptation found in the IC (McAlpine et. al. 2000).

## References:

D. McAlpine, D. Jiang, T. M. Shackleton, and A. R. Palmer. Responses of neurons in the inferior colliculus to dynamic interaural phase cues: Evidence for a mechanism of binaural adaptation. J. Neurophysiol., 83(3):1356 - 1365, Mar. 2000.

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 ]