Document Detail

The speech intelligibility benefit of a unilateral wireless system for hearing-impaired adults.
MedLine Citation:
PMID:  21929375     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: This study measured the effects of two previously untested practical considerations-venting and transmission delays-on speech intelligibility in a simulated unilateral wireless system, where a target signal in background noise was transmitted wirelessly to the hearing-impaired (HI) listener.
DESIGN: Speech reception thresholds (SRTs) relative to the signal-to-noise ratio (SNR) were measured by varying the surrounding babble noise level. The target signal was presented at 0° azimuth in the soundfield and unilaterally via an insert earphone, using open and closed fittings with simulated-wireless delays ranging between 0-160 ms. SRTs were also measured unaided and with participants' current hearing aid(s).
STUDY SAMPLE: Thirty-three mild-to-moderate sensorineural HI adults participated in the experiment.
RESULTS: For an open fitting, the results showed a 5-dB SNR benefit in SRT compared to unaided performance at shorter delays. For a closed fitting, the majority of participants could accurately recognize speech below - 20 dBSNR across delays.
CONCLUSIONS: These results highlight the efficacy of wireless systems with HI adults. Speech-intelligibility benefits are affected by transmission delays only when the delay is greater than 40 ms and the coupling is vented.
William M Whitmer; Christopher G Brennan-Jones; Michael A Akeroyd
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-20
Journal Detail:
Title:  International journal of audiology     Volume:  50     ISSN:  1708-8186     ISO Abbreviation:  Int J Audiol     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-11-22     Completed Date:  2012-03-15     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  101140017     Medline TA:  Int J Audiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  905-11     Citation Subset:  IM    
MRC Institute of Hearing Research (Scottish Section), Glasgow, UK.
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MeSH Terms
Hearing Loss / therapy
Middle Aged
Speech Acoustics
Speech Perception*
Wireless Technology*
Grant Support
MC_U135097131//Medical Research Council; U.1275(97131)//Medical Research Council; //Chief Scientist Office; //Medical Research Council

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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