Document Detail


Binaural dichotic presentation to reduce the effects of spectral masking in moderate bilateral sensorineural hearing loss.
MedLine Citation:
PMID:  22201526     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: The objective of the study was to evaluate the effectiveness of binaural dichotic presentation using comb filters with complementary magnitude responses, based on fixed bandwidth and auditory critical bandwidth, in improving speech perception by persons with moderate bilateral sensorineural hearing loss, and to assess its effect on localization of the sound source.
DESIGN AND STUDY SAMPLE: Listening tests involving consonant recognition and source direction identification were conducted on six normal-hearing subjects under simulated hearing loss and on eleven subjects with moderate bilateral sensorineural loss in quiet.
RESULTS: The tests on normal-hearing subjects showed higher recognition scores and smaller response times for the comb filters based on the auditory critical bandwidth. The tests using these comb filters on the hearing-impaired subjects resulted in an increase of 14%-31% (mean: 22%) in recognition scores and a significant decrease in response times, with no significant effect on the identification of the direction of broadband sound sources.
CONCLUSIONS: The results show that dichotic presentation may be useful for speech processing in binaural hearing aids.
Authors:
Pandurangarao N Kulkarni; Prem C Pandey; Dakshayani S Jangamashetti
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-12-27
Journal Detail:
Title:  International journal of audiology     Volume:  51     ISSN:  1708-8186     ISO Abbreviation:  Int J Audiol     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-09     Completed Date:  2012-07-03     Revised Date:  2013-07-15    
Medline Journal Info:
Nlm Unique ID:  101140017     Medline TA:  Int J Audiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  334-44     Citation Subset:  IM    
Affiliation:
Department of Electrical Engineering, Indian Institute of Technology Bombay, Powai, Maharashtra, India.
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation
Adult
Audiometry, Pure-Tone
Auditory Threshold
Case-Control Studies
Correction of Hearing Impairment* / psychology
Dichotic Listening Tests
Equipment Design
Female
Hearing Aids*
Hearing Impaired Persons / psychology,  rehabilitation*
Hearing Loss, Bilateral / diagnosis,  psychology,  rehabilitation*
Hearing Loss, Sensorineural / diagnosis,  psychology,  rehabilitation*
Humans
India
Male
Middle Aged
Perceptual Masking*
Reaction Time
Recognition (Psychology)
Severity of Illness Index
Sound Localization*
Sound Spectrography
Speech Perception*
Time Factors

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


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