Klug, Jonas and Schmors, Lisa and Ashida, Go and Dietz, Mathias (2020) Neural rate difference model can account for lateralization of high-frequency stimuli. The journal of the Acoustical Society of America, 148 (2). pp. 678-691. ISSN 1520-8524

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Abstract

Lateralization of complex high-frequency sounds is conveyed by interaural level differences (ILDs) and interaural time differences (ITDs) in the envelope. In this work, the authors constructed an auditory model and simulate data from three previous behavioral studies obtained with, in total, over 1000 different amplitude-modulated stimuli. The authors combine a well-established auditory periphery model with a functional count-comparison model for binaural excitatory–inhibitory (EI) interaction. After parameter optimization of the EI-model stage, the hemispheric rate-difference between pairs of EI-model neurons relates linearly with the extent of laterality in human listeners. If a certain ILD and a certain envelope ITD each cause a similar extent of laterality, they also produce a similar rate difference in the same model neurons. After parameter optimization, the model accounts for 95.7% of the variance in the largest dataset, in which amplitude modulation depth, rate of modulation, modulation exponent, ILD, and envelope ITD were varied. The model also accounts for 83% of the variances in each of the other two datasets using the same EI model parameters.

Item Type:	Article
Divisions:	Faculty of Medicine and Health Sciences > Department of Medical Physics and Acoustics
Date Deposited:	12 Feb 2021 13:21
Last Modified:	12 Feb 2021 13:21
URI:	https://oops.uni-oldenburg.de/id/eprint/4809
URN:	urn:nbn:de:gbv:715-oops-48901
DOI:	10.1121/10.0001602
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