| Assessing the benefit of adaptive null-steering using real-world signals. | |
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MedLine Citation:
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PMID: 20192874 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study compared the noise reduction of adaptive null-steering and near-hypercardioid directional hearing-aid algorithms via performance on real-world signals. Using subject-individualized and generic (i.e. similar to current hearing aids), off-line frequency-domain implementations, we processed recordings made through two microphones of a BTE device worn by five subjects. Recording scenarios included homes, offices, cafés, streets, buses, and automobiles. We found practically all (> 95% of recording time) adaptive noise-reduction benefit for generic implementations is below 1.2 dB, and 96% and 92% is below 2 dB for 16-and 32-band individualized implementations, respectively. A 256-band, individualized implementation showed a majority of benefit between 1-4 dB. We found no extended (> 2 s) continuous periods of significant (> 2 dB) benefit for the generic adaptive implementations. The recordings-having many independent and simultaneously active sources, spatially extended sources, significant reverberation, or combinations thereof-indicate an environment comprising few instances of high direct-to-diffuse energy situations. Combined with results from previous field trials, the evidence suggests that such an environment is common and represents a significant limitation on adaptive benefit. |
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Authors:
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William S Woods; Ivo Merks; Tao Zhang; Kelly Fitz; Brent Edwards |
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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 Jun |
Date Detail:
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Created Date: 2010-05-20 Completed Date: 2010-09-02 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: 434-43 Citation Subset: IM |
Affiliation:
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Starkey Laboratories, Inc., Eden Prairie, Minnesota, USA. william_woods@starkey.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms* Auditory Threshold* Computer Simulation Female Hearing Aids* Hearing Loss, Sensorineural / rehabilitation* Humans Male Perceptual Masking* Prosthesis Design Signal Processing, Computer-Assisted* Social Environment Sound Localization* Sound Spectrography Speech Acoustics Speech Perception* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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