| Effect of spatial separation, extended bandwidth, and compression speed on intelligibility in a competing-speech task. | |
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MedLine Citation:
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PMID: 20649230 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The benefit for speech intelligibility of extending the bandwidth of hearing aids was assessed when the target speech (sentences) and background (two talkers) were co-located or spatially separated. Also, the relative benefits of slow and fast compression were assessed. Sixteen hearing-impaired (HI) subjects with mild-to-moderate high-frequency hearing loss and eight normal-hearing (NH) subjects were tested. The target and interfering sounds were recorded using a KEMAR manikin and were located at +/-60 degrees azimuth, either co-located or spatially separated. Simulated binaural hearing-aid processing using five-channel slow or fast compression was performed offline, with gains set individually for each HI subject. Upper cutoff frequencies were 5, 7.5, or 10 kHz. Processed stimuli were presented via headphones. For both NH (unaided) and HI subjects, there was no significant effect of cutoff frequency for the co-located condition, but a small but significant benefit from increasing the cutoff frequency from 5 to 7.5 kHz for the spatially separated condition. For the HI subjects, slow compression gave slightly but significantly higher scores than fast compression for the spatially separated but not for the co-located condition. There were marked individual differences both in the benefit from extended bandwidth and in the relative benefit of slow and fast compression. |
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Authors:
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Brian C J Moore; Christian Füllgrabe; Michael A Stone |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-23 Completed Date: 2010-11-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 360-71 Citation Subset: IM |
Affiliation:
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Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, England. bcjm@cam.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Aged Aged, 80 and over Audiometry Auditory Threshold Case-Control Studies Cues* Female Hearing Aids* Hearing Disorders / psychology, therapy* Hearing Impaired Persons / psychology, rehabilitation* Humans Male Middle Aged Noise / adverse effects* Perceptual Masking* Rehabilitation of Hearing Impaired* / psychology Signal Detection, Psychological Signal Processing, Computer-Assisted Sound Spectrography Speech Intelligibility* |
| Grant Support | |
ID/Acronym/Agency:
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G0701870//Medical Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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