Simulation of hearing impairment based on the Fourier time transformation

J. Chalupper, H. Fastl

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

A signal processing system was designed to simulate hearing impairment for normal hearing listeners. Typical consequences of sensorineural hearing loss are an elevated threshold in quiet, abnormal growth of loudness ('recruitment') and reduced spectral and temporal resolution. However, the just noticable difference (jnd) in intensity is unaffected. Based on an aurally adequate time-frequency representation, these effects can be simulated by intensity quantization and frequency dependent dynamic level expansion. The Fourier time transformation (FTT) was used for analysis of the time signal and the inverse FTT for resynthesis of the modified complex spectra. Input-output functions used for level expansion are calculated from the audiogram and a categorical loudness scaling procedure. Hearing experiments were carried out to find the appropriate quantization step and to simulate intensity jnd's of normal and hearing impaired listeners. The proposed processing scheme will be used to improve the design and fitting of hearing aids.

Original languageEnglish
Title of host publicationSignal Processing Theory and Methods IIAudio and ElectroacusticsSpeech Processing I
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages857-860
Number of pages4
ISBN (Electronic)0780362934
DOIs
StatePublished - 2000
Event25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000 - Istanbul, Turkey
Duration: 5 Jun 20009 Jun 2000

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2
ISSN (Print)1520-6149

Conference

Conference25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000
Country/TerritoryTurkey
CityIstanbul
Period5/06/009/06/00

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