Characterizing auditory processing and perception in individual listeners with sensorineural hearing loss

Morten Løve Jepsen, Torsten Dau

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Abstract

This study considered consequences of sensorineural hearing loss in ten listeners. The characterization of individual hearing loss was based on psychoacoustic data addressing audiometric pure-tone sensitivity, cochlear compression, frequency selectivity, temporal resolution, and intensity discrimination. In the experiments it was found that listeners with comparable audiograms can show very different results in the supra-threshold measures. In an attempt to account for the observed individual data, a model of auditory signal processing and perception [Jepsen et al., J. Acoust. Soc. Am. 124, 422–438 (2008)] was used as a framework. The parameters of the cochlear processing stage of the model were adjusted to account for behaviorally estimated individual basilar-membrane inputoutput functions and the audiogram, from which the amounts of inner hair-cell and outer hair-cell losses were estimated as a function of frequency. All other model parameters were left unchanged. The predictions showed a reasonably good agreement with the measured individual data in the frequency selectivity and forward masking conditions while the variation of intensity discrimination thresholds across listeners was underestimated by the model. The model and the associated parameters for individual hearing-impaired listeners might be useful for investigating effects of individual hearing impairment in more complex conditions, such as speech intelligibility in noise.
Original languageEnglish
JournalAcoustical Society of America. Journal
Volume129
Issue number1
Pages (from-to)262-281
ISSN0001-4966
DOIs
Publication statusPublished - 2011

Bibliographical note

Running title: Characterizing auditory processing in hearing impairment

Keywords

  • Auditory processing
  • Hair-cell loss
  • Computational model
  • Hearing impairment
  • Cochlear nonlinearity

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