Encke, Jörg and Dietz, Mathias (2022) A hemispheric two-channel code accounts for binaural unmasking in humans. Communications biology, 5 (1122). pp. 1-10. ISSN 2399-3642


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Official URL: https://www.nature.com/articles/s42003-022-04098-x


Sound in noise is better detected or understood if target and masking sources originate from different locations. Mammalian physiology suggests that the neurocomputational process that underlies this binaural unmasking is based on two hemispheric channels that encode interaural differences in their relative neuronal activity. Here, we introduce a mathematical formulation of the two-channel model – the complex-valued correlation coefficient. We show that this formulation quantifies the amount of temporal fluctuations in interaural differences, which we suggest underlie binaural unmasking. We applied this model to an extensive library of psychoacoustic experiments, accounting for 98% of the variance across eight studies. Combining physiological plausibility with its success in explaining behavioral data, the proposed mechanism is a significant step towards a unified understanding of binaural unmasking and the encoding of interaural differences in general.

Item Type: Article
Subjects: Science and mathematics > Life sciences, biology
Divisions: Faculty of Medicine and Health Sciences > Department of Medical Physics and Acoustics
Date Deposited: 27 Jan 2023 11:57
Last Modified: 27 Jan 2023 11:57
URI: https://oops.uni-oldenburg.de/id/eprint/5554
URN: urn:nbn:de:gbv:715-oops-56354
DOI: 10.1038/s42003-022-04098-x

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