| Measuring real-ear signal-to-noise ratio: application to directional hearing aids. | |
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MedLine Citation:
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PMID: 20151932 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Due to individual characteristics such as head size, earmould type, and earmould venting, the directional benefit that an individual will obtain from a hearing aid cannot be predicted from average data. It is therefore desirable to measure real ear directional benefit. This paper demonstrates a method to measure real ear hearing aid directivity based on a general approach to measure the broadband output signal-to-noise ratio of a hearing aid. Errors arising from non-linearity were tested in simulation and found to be low for typical hearing aid compression ratios. Next, the efficacy of the method to estimate directional benefit was demonstrated on KEMAR. Finally the variability of directional benefit was explored in real-ears. Significant differences in signal-to-noise ratio between directional and omnidirectional microphone settings were demonstrated at most azimuths. Articulation-Index-weighted directional benefit varied by more than 7 dB across ears at some azimuths. Such individual variation in directional benefit has implications when fitting hearing aids: it should not be assumed that all users will receive similar directional benefit from the same hearing aid. |
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Authors:
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Steven L Bell; Sarah A Creeke; Mark E Lutman |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: International journal of audiology Volume: 49 ISSN: 1708-8186 ISO Abbreviation: Int J Audiol Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-15 Completed Date: 2010-05-04 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: 238-46 Citation Subset: IM |
Affiliation:
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Institute of Sound and Vibration Research, University of Southampton, UK. slb@isvr.soton.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustics Adolescent Adult Computer Simulation Female Hearing* Hearing Aids* Humans Male Noise* Speech Perception Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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