Towards objective measures of speech intelligibility for Cochlear Implant users in reverberant environments

Stefano Cosentino*, Torsten Marquardt, David McAlpine, Tiago H. Falk

*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

This study validates a novel approach to predict speech intelligibility for Cochlear Implant users (CIs) in reverberant environments. More specifically, we explore the use of existing objective quality and intelligibility metrics, applied directly to vocoded speech degraded by room reverberation, here assessed at ten different reverberation time (RT60) values: 0 s, 0.4 s - 1.0 s (0.1 s increments), 1.5 s and 2 s. Eight objective speech intelligibility predictors (SIPs) were investigated in this study. Of these, two were non-intrusive (i.e. did not require a reference signal) audio quality measures, four were intrusive, and two were intrusive speech intelligibility indexes. Three types of vocoders were implemented to examine how speech intelligibility predictions depended on the vocoder type. These were: noise-excited vocoder, tone-excited vocoder and a FFT-based N-of-M vocoder. Experimental results show that several intrusive quality and intelligibility measures were highly correlated with exponentially fit CI intelligibility data. On the other hand, only a recently - developed non-intrusive measure showed high correlations. These evaluations suggest that CI intelligibility may be accurately assessed via objective metrics applied to vocoded speech, thus may reduce the need for expensive and time-consuming listening tests.

Original languageEnglish
Title of host publication2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages666-671
Number of pages6
ISBN (Electronic)9781467303828
ISBN (Print)9781467303811
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012 - Montreal, QC, Canada
Duration: 2 Jul 20125 Jul 2012

Other

Other2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012
CountryCanada
CityMontreal, QC
Period2/07/125/07/12

Keywords

  • Cochlear Implants
  • Objective Measures
  • Reverberation
  • Speech Intelligibility
  • Vocoders

Fingerprint Dive into the research topics of 'Towards objective measures of speech intelligibility for Cochlear Implant users in reverberant environments'. Together they form a unique fingerprint.

Cite this