| Indication for the need of flexible and frequency specific mapping functions in cochlear implant speech processors. | |
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MedLine Citation:
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PMID: 17004087 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Categorical loudness scaling of electric and acoustic stimuli was performed in cochlear implant (CI) recipients equipped with Nucleus systems in order to achieve a normal loudness perception in the whole dynamic range of acoustic input. For each electrode, the lower and upper limits of electric stimulus were defined by the values corresponding to "very soft" and "too loud". Within this dynamic range, the stimulus strength intervals associated to the verbal categories "soft", "medium", "loud" and "very loud" were determined. The same loudness categories were used for the scaling of acoustic stimuli. From both scaling experiments, the transduction of the CI system can be assessed and the parameters of the individual mapping function yielding a normal loudness growth can be derived. Deviations from optimum mapping can be corrected at least partially by manipulating the parameters of the mapping function. In many cases, however, one mapping function is not sufficient for all channels. The results argue in favour of the development of flexible and channel-specific mapping function parameters in future CI systems. |
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Authors:
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Sebastian Hoth |
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Publication Detail:
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Type: Journal Article Date: 2006-09-27 |
Journal Detail:
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Title: European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery Volume: 264 ISSN: 0937-4477 ISO Abbreviation: Eur Arch Otorhinolaryngol Publication Date: 2007 Feb |
Date Detail:
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Created Date: 2006-12-20 Completed Date: 2007-10-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9002937 Medline TA: Eur Arch Otorhinolaryngol Country: Germany |
Other Details:
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Languages: eng Pagination: 129-38 Citation Subset: IM |
Affiliation:
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Univ.-HNO-Klinik Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. sebastian.hoth@med.uni-heidelberg.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cochlear Implants* Deafness / rehabilitation Female Humans Loudness Perception / physiology Male Prosthesis Fitting Signal Processing, Computer-Assisted / instrumentation Speech Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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