The performance of different synthesis signals in acoustic models of cochlear implants

dc.contributor.authorStrydom, Trudie
dc.contributor.authorHanekom, Johannes Jurgens
dc.contributor.emailjohan.hanekom@up.ac.zaen_ZA
dc.date.accessioned2017-10-18T09:01:31Z
dc.date.available2017-10-18T09:01:31Z
dc.date.issued2011-02
dc.description.abstractSynthesis (carrier) signals in acoustic models embody assumptions about perception of auditory electric stimulation. This study compared speech intelligibility of consonants and vowels processed through a set of nine acoustic models that used Spectral Peak (SPEAK) and Advanced Combination Encoder (ACE)-like speech processing, using synthesis signals which were representative of signals used previously in acoustic models as well as two new ones. Performance of the synthesis signals was determined in terms of correspondence with cochlear implant (CI) listener results for 12 attributes of phoneme perception (consonant and vowel recognition; F1, F2, and duration information transmission for vowels; voicing, manner, place of articulation, affrication, burst, nasality, and amplitude envelope information transmission for consonants) using four measures of performance. Modulated synthesis signals produced the best correspondence with CI consonant intelligibility, while sinusoids, narrow noise bands, and varying noise bands produced the best correspondence with CI vowel intelligibility. The signals that performed best overall (in terms of correspondence with both vowel and consonant attributes) were modulated and unmodulated noise bands of varying bandwidth that corresponded to a linearly varying excitation width of 0.4 mm at the apical to 8 mm at the basal channels.en_ZA
dc.description.departmentElectrical, Electronic and Computer Engineeringen_ZA
dc.description.librarianam2017en_ZA
dc.description.sponsorshipThe National Research Foundation of South Africaen_ZA
dc.description.urihttp://scitation.aip.org/content/asa/journal/jasaen_ZA
dc.identifier.citationStrydom, T. & Hanekom, J.J. 2011, 'The performance of different synthesis signals in acoustic models of cochlear implants', Journal of the Acoustical Society of America, vol. 129, no. 2, pp. 920-933.en_ZA
dc.identifier.issn0001-4966 (print)
dc.identifier.issn1520-8524 (online)
dc.identifier.other10.1121/1.3518760
dc.identifier.urihttp://hdl.handle.net/2263/62827
dc.language.isoenen_ZA
dc.publisherAcoustical Society of Americaen_ZA
dc.rights© 2011 Acoustical Society of Americaen_ZA
dc.subjectSynthesis signalsen_ZA
dc.subjectCarrier signalsen_ZA
dc.subjectAcoustic modelsen_ZA
dc.subjectAuditory electric stimulationen_ZA
dc.subjectSpeech intelligibilityen_ZA
dc.subjectSpectral peak (SPEAK)en_ZA
dc.subjectAdvanced combination encoder (ACE)en_ZA
dc.subjectCochlear implantsen_ZA
dc.titleThe performance of different synthesis signals in acoustic models of cochlear implantsen_ZA
dc.typeArticleen_ZA

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