A binaural model predicting the effect of hearing impairment and noise level on speech intelligibility

Thibault Vicente*, Mathieu Lavandier, Jörg M. Buchholz

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

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Abstract

A model will be presented that allows predicting binaural speech intelligibility in noise for normal-hearing (NH) and hearing-impaired (HI) listeners. The model inputs are the masker and target signals at the listener's ears, as well as their audiogram that is used to implement an internal noise (IN). The model computes per time frame and frequency band a binaural masking level difference (BMLD) when all signal levels are higher than the IN level, and the signal-to-noise ratio at the better ear (BE-SNR) using the maximum between the masker and IN levels. The BMLD and BE-SNR are integrated across time and frequency and summed to obtain a binaural ratio. The relative differences of the binaural ratios are compared to speech reception threshold (SRT) differences measured in listening tests. The model was validated on one experiment involving NH and HI listeners. Stimuli were anechoic and played using headphones. The target, in front of the listener, was presented simultaneously with two noise-vocoded speech maskers either collocated with the target or separated at +/- 90º. The noise was presented at different sensation levels and the relative target level was adapted to derive SRTs. The experimental data were accurately predicted by the model.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationintegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
Place of PublicationGermany
PublisherInternational Commission for Acoustics (ICA)
Pages2197-2201
Number of pages5
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 9 Sep 201913 Sep 2019

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
CountryGermany
CityAachen
Period9/09/1913/09/19

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • model
  • speech intelligibility
  • binaural
  • hearing impairment

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