THE AUDITORY MODELING TOOLBOX
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 |
Description
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 ]
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