| Relative importance of different spectral bands to consonant identification: relevance for frequency transposition in hearing aids. | |
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MedLine Citation:
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PMID: 19925341 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Listeners with high-frequency dead regions (DRs) benefit from amplification of frequencies up to 1.7 times the edge frequency, f(e), of the DR. Better consonant identification might be achieved by replacing the band from f(e) to 1.7f(e) with a higher spectral band. We aimed to identify the optimal band, using simulations with normal-hearing listeners. In experiment 1, nonsense syllables were lowpass filtered to simulate DRs with f(e) of 0.5, 0.75, and 1.0 kHz. Identification was measured for each of these base bands alone and with a bandpass-filtered band added (but not transposed). The added band either extended from f(e) to 1.7f(e) or its center frequency was increased, keeping bandwidth fixed in ERB(N)-number. Performance improved with increasing center frequency and then reached an asymptote or declined. Experiment 2 used a mid-frequency base band, and a lower-frequency added band. The results also showed a beneficial effect of frequency separation of the added and base bands. Experiment 3 resembled experiment 1, but with bandwidth fixed in Hertz. For higher-frequency added bands, the benefit was lower than for experiment 1. |
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Authors:
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Deborah Vickers; Joanna D Robinson; Christian F??llgrabe; Thomas Baer; Brian C J Moore |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of audiology Volume: 48 ISSN: 1708-8186 ISO Abbreviation: Int J Audiol Publication Date: 2009 |
Date Detail:
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Created Date: 2009-11-20 Completed Date: 2010-01-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140017 Medline TA: Int J Audiol Country: England |
Other Details:
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Languages: eng Pagination: 334-45 Citation Subset: IM |
Affiliation:
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UCL Ear Institute, London, United Kingdom. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adolescent Adult Analysis of Variance Audiometry Female Hearing Aids* Hearing Tests Humans Male Phonetics* Speech Speech Acoustics* Speech Perception* Task Performance and Analysis Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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//Medical Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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