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Article: New cochlear implant coding strategy for tonal language speakers

TitleNew cochlear implant coding strategy for tonal language speakers
Authors
Issue Date2008
PublisherInforma Healthcare. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/14992027.asp
Citation
International Journal Of Audiology, 2008, v. 47 n. 6, p. 337-347 How to Cite?
AbstractAccurate pitch perception on the basis of fundamental frequency patterns is essential for the processing of lexical tones in tonal languages such as Cantonese. Speech intelligibility in Cantonese-speaking CI recipients was compared using current signal processing strategies, which typically result in poor pitch perception, and a new strategy, known as the multi-channel envelope modulation (MEM) strategy, was designed to enhance temporal periodicity cues to the fundamental frequency. Performance of nine postlingually hearing-impaired adult cochlear implant users was measured twice using each strategy, initially after a four week trial, and again after two weeks of use with each strategy. Speech intelligibility in speech-spectrum shaped noise was measured using the Cantonese hearing in noise test. A fixed noise level of 65 dB A was used and the signal-to-noise ratios were fixed at either +10, +15, or +20 dB, depending on the baseline performance of individual subjects using the clinical processor. Self-reported benefit in 18 listening situations and overall preference for strategies were obtained at the end of these trial periods. Results showed poorer speech intelligibility with CIS while results obtained using ACE and MEM were comparable. Unfamiliar place coding might have contributed to poorer performance using CIS. Self-reported benefit across strategies did not differ in most listening situations. Participants preferred ACE for listening overall in daily situations, and a few preferred MEM in noise. Whilst the results did not demonstrate any advantages for speech recognition in noise when using MEM compared to ACE, no degradation in performance was observed. This implies that the form of processing employed by MEM retains similar segmental information to that provided by ACE and that potentially, future variations/optimizations of MEM may lead to some improvement in tone perception. © 2008 British Society of Audiology, International Society of Audiology, and Nordic Audiological Society.
Persistent Identifierhttp://hdl.handle.net/10722/175303
ISSN
2015 Impact Factor: 1.681
2015 SCImago Journal Rankings: 1.238
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWong, LLNen_US
dc.contributor.authorVandali, AEen_US
dc.contributor.authorCiocca, Ven_US
dc.contributor.authorLuk, Ben_US
dc.contributor.authorIp, VWKen_US
dc.contributor.authorMurray, Ben_US
dc.contributor.authorYu, HCen_US
dc.contributor.authorChung, Ien_US
dc.date.accessioned2012-11-26T08:58:03Z-
dc.date.available2012-11-26T08:58:03Z-
dc.date.issued2008en_US
dc.identifier.citationInternational Journal Of Audiology, 2008, v. 47 n. 6, p. 337-347en_US
dc.identifier.issn1499-2027en_US
dc.identifier.urihttp://hdl.handle.net/10722/175303-
dc.description.abstractAccurate pitch perception on the basis of fundamental frequency patterns is essential for the processing of lexical tones in tonal languages such as Cantonese. Speech intelligibility in Cantonese-speaking CI recipients was compared using current signal processing strategies, which typically result in poor pitch perception, and a new strategy, known as the multi-channel envelope modulation (MEM) strategy, was designed to enhance temporal periodicity cues to the fundamental frequency. Performance of nine postlingually hearing-impaired adult cochlear implant users was measured twice using each strategy, initially after a four week trial, and again after two weeks of use with each strategy. Speech intelligibility in speech-spectrum shaped noise was measured using the Cantonese hearing in noise test. A fixed noise level of 65 dB A was used and the signal-to-noise ratios were fixed at either +10, +15, or +20 dB, depending on the baseline performance of individual subjects using the clinical processor. Self-reported benefit in 18 listening situations and overall preference for strategies were obtained at the end of these trial periods. Results showed poorer speech intelligibility with CIS while results obtained using ACE and MEM were comparable. Unfamiliar place coding might have contributed to poorer performance using CIS. Self-reported benefit across strategies did not differ in most listening situations. Participants preferred ACE for listening overall in daily situations, and a few preferred MEM in noise. Whilst the results did not demonstrate any advantages for speech recognition in noise when using MEM compared to ACE, no degradation in performance was observed. This implies that the form of processing employed by MEM retains similar segmental information to that provided by ACE and that potentially, future variations/optimizations of MEM may lead to some improvement in tone perception. © 2008 British Society of Audiology, International Society of Audiology, and Nordic Audiological Society.en_US
dc.languageengen_US
dc.publisherInforma Healthcare. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/14992027.aspen_US
dc.relation.ispartofInternational Journal of Audiologyen_US
dc.subject.meshAdulten_US
dc.subject.meshAuditory Thresholden_US
dc.subject.meshCochlear Implantsen_US
dc.subject.meshFemaleen_US
dc.subject.meshHearing Loss - Diagnosis - Rehabilitationen_US
dc.subject.meshHumansen_US
dc.subject.meshLanguageen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle Ageden_US
dc.subject.meshPitch Perceptionen_US
dc.subject.meshProsthesis Designen_US
dc.subject.meshQuestionnairesen_US
dc.subject.meshSignal Processing, Computer-Assisteden_US
dc.subject.meshSpeech Discrimination Testsen_US
dc.titleNew cochlear implant coding strategy for tonal language speakersen_US
dc.typeArticleen_US
dc.identifier.emailWong, LLN: llnwong@hku.hken_US
dc.identifier.authorityWong, LLN=rp00975en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1080/14992020802070788en_US
dc.identifier.pmid18569106-
dc.identifier.scopuseid_2-s2.0-47349109607en_US
dc.identifier.hkuros161040-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-47349109607&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume47en_US
dc.identifier.issue6en_US
dc.identifier.spage337en_US
dc.identifier.epage347en_US
dc.identifier.isiWOS:000257030900007-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWong, LLN=7402091891en_US
dc.identifier.scopusauthoridVandali, AE=6603321497en_US
dc.identifier.scopusauthoridCiocca, V=6604000275en_US
dc.identifier.scopusauthoridLuk, B=24175955900en_US
dc.identifier.scopusauthoridIp, VWK=24469570300en_US
dc.identifier.scopusauthoridMurray, B=24470499600en_US
dc.identifier.scopusauthoridYu, HC=24176324800en_US
dc.identifier.scopusauthoridChung, I=24469663600en_US

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