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Evaluation of a method for enhancing interaural level differences at low frequencies.

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cam.issuedOnline2016-10-20
dc.contributor.authorMoore, Brian CJ
dc.contributor.authorKolarik, Andrew
dc.contributor.authorStone, Michael A
dc.contributor.authorLee, Young-Woo
dc.contributor.orcidMoore, Brian [0000-0001-7071-0671]
dc.date.accessioned2018-05-31T09:09:12Z
dc.date.available2018-05-31T09:09:12Z
dc.date.issued2016-10-20
dc.description.abstractA method (called binaural enhancement) for enhancing interaural level differences at low frequencies, based on estimates of interaural time differences, was developed and evaluated. Five conditions were compared, all using simulated hearing-aid processing: (1) Linear amplification with frequency-response shaping; (2) binaural enhancement combined with linear amplification and frequency-response shaping; (3) slow-acting four-channel amplitude compression with independent compression at the two ears (AGC4CH); (4) binaural enhancement combined with four-channel compression (BE-AGC4CH); and (5) four-channel compression but with the compression gains synchronized across ears. Ten hearing-impaired listeners were tested, and gains and compression ratios for each listener were set to match targets prescribed by the CAM2 fitting method. Stimuli were presented via headphones, using virtualization methods to simulate listening in a moderately reverberant room. The intelligibility of speech at ±60° azimuth in the presence of competing speech on the opposite side of the head at ±60° azimuth was not affected by the binaural enhancement processing. Sound localization was significantly better for condition BE-AGC4CH than for condition AGC4CH for a sentence, but not for broadband noise, lowpass noise, or lowpass amplitude-modulated noise. The results suggest that the binaural enhancement processing can improve localization for sounds with distinct envelope fluctuations.
dc.identifier.doi10.17863/CAM.14714
dc.identifier.eissn1520-8524
dc.identifier.issn0001-4966
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/276368
dc.languageeng
dc.language.isoeng
dc.publisherAcoustical Society of America (ASA)
dc.publisher.urlhttp://dx.doi.org/10.1121/1.4965299
dc.subject1701 Psychology
dc.subjectClinical Research
dc.subjectEar
dc.titleEvaluation of a method for enhancing interaural level differences at low frequencies.
dc.typeArticle
dcterms.dateAccepted2016-10-05
prism.endingPage2817
prism.issueIdentifier4
prism.publicationDate2016
prism.publicationNameJ Acoust Soc Am
prism.startingPage2817
prism.volume140
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M026957/1)
pubs.funder-project-idRosetrees Trust (JS16/M264)
pubs.funder-project-idLeicester Foundation (JS16/M264)
pubs.funder-project-idMedical Research Council (G0701870)
pubs.funder-project-idMedical Research Council (G8717539)
rioxxterms.licenseref.startdate2016-10-20
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1121/1.4965299

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