Optimizing frequency-to-electrode allocation in cochlear implants.
This study tested the hypothesis that speech perception of cochlear implant users could be improved by increasing the number of electrodes allocated to frequencies below 2.6 kHz, with correspondingly fewer electrodes allocated above this point. Eight users of the Nucleus CI22 implant participated an...
| Publicado en: | Journal of the American Academy of Audiology Vol. 15; no. 8; pp. 574 - 585 |
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| Autores principales: | , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Thieme Medical Publishing Inc.
Sep2004
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106581931&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106581931 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10500545 9OC jtl: Journal of the American Academy of Audiology issn: 10500545 maglogo: Y pubinfo: dt: Sep2004 vid: 15 iid: 8 pid: 2811 pub: Thieme Medical Publishing Inc. place: New York, New York artinfo: ui: 106581931 15195856 2005037649 10.3766/jaaa.15.8.5 NLM15553657 106581931 ppf: 574 ppct: 11 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Optimizing frequency-to-electrode allocation in cochlear implants. aug: au: Leigh JR Henshall KR McKay CM affil: University of Melbourne, Department of Otolaryngology sug: subj: Cochlear Implant Electrodes Speech Perception Aged Consonants Descriptive Statistics Experimental Studies Funding Source Middle Age Speech Discrimination Tests Two-Way Analysis of Variance Vowels Word Lists Human Aged: 65+ years Middle Aged: 45-64 years ab: This study tested the hypothesis that speech perception of cochlear implant users could be improved by increasing the number of electrodes allocated to frequencies below 2.6 kHz, with correspondingly fewer electrodes allocated above this point. Eight users of the Nucleus CI22 implant participated and wore experimental maps in which the widths of the analysis filters were altered to provide either two or three extra low-frequency channels. Speech perception was tested following periods of take-home experience. Information transmission analysis of vowel and consonant confusions appear to support our hypothesis, showing that vowel first formant information was significantly better perceived with the experimental map and that consonant information was not significantly different. The results of CNC word testing appear to contradict this result, showing that the experimental map degraded both vowel and consonant perception. Overall, the experimental map had a small and variable effect on speech perception. These results do not support our hypothesis and indicate that further research is needed to investigate the possible effects of narrowing the filter bandwidth in low frequencies, as done in this experiment. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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