Analysis of a forward masking paradigm proposed to estimate cochlear compression using an auditory nerve model and signal detection theory

Jens Thuren Lindahl, Gerard Encina-Llamas*, Bastian Epp

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

The healthy human auditory system has a large dynamic range. An “active mechanism”, presumably due to the electromotility of the outer hair cells in the cochlea, leads to level-dependent amplification of basilar membrane (BM) vibration and a compressive BM input/output function. Different methods for estimating this compressive function based on behavioural forward masking have been suggested. These methods are based on the assumption that BM processing can be isolated from the response of the overall system and that the forward masking onto the probe is different for on- and off-frequency maskers. In the present study, a computational model of the auditory nerve (AN) in combination with methods from signal detection theory was used to test these assumptions. The simulated AN response was quantified in terms of rate and synchrony for different AN fibre types. Contribution of different tonotopic regions to overall sensitivity to the stimuli were analysed. The results show that on- and off-frequency maskers produce similar forward masking onto the probe. The simulation results suggest that the estimate of compression based on the behavioural experiment cannot be derived from sensitivity at the level of the AN but requires additional contributions, consistent with physiological studies.
Original languageEnglish
Title of host publicationProceedings of the International Symposium on Auditory and Audiological Research : Auditory Learning in Biological and Artificial Systems
Volume7
PublisherThe Danavox Jubilee Foundation
Publication date2020
Pages445-452
Publication statusPublished - 2020
EventInternational Symposium on Auditory and Audiological Research: Auditory Learning in Biological and Artificial Systems - Nyborg, Denmark
Duration: 21 Aug 201923 Aug 2019
http://isaar.eu

Conference

ConferenceInternational Symposium on Auditory and Audiological Research
CountryDenmark
CityNyborg
Period21/08/201923/08/2019
Internet address
SeriesProceedings of the International Symposium on Audiological and Auditory Research
Volume7
ISSN2596-5522

Keywords

  • Cochlea
  • Auditory nerve
  • Compression
  • Cochlear compression
  • Computational modeling
  • Signal detection theory

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