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Binaural dichotic presentation to reduce the effects of spectral masking in moderate bilateral sensorineural hearing loss

DSpace at IIT Bombay

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Title Binaural dichotic presentation to reduce the effects of spectral masking in moderate bilateral sensorineural hearing loss
 
Creator KULKARNI, PN
PANDEY, PC
JANGAMASHETTI, DS
 
Subject Binaural hearing
comb filters
dichotic presentation
sensorineural hearing loss
spectral masking
spectral splitting
SOUND LOCALIZATION
IMPAIRED LISTENERS
HIGH-FREQUENCIES
RESPONSE-TIMES
SPEECH
INTELLIGIBILITY
NOISE
MODELS
ENHANCEMENT
BANDS
 
Description 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.
 
Publisher INFORMA HEALTHCARE
 
Date 2014-10-16T05:56:08Z
2014-10-16T05:56:08Z
2012
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF AUDIOLOGY, 51(4)334-344
http://dx.doi.org/10.3109/14992027.2011.642012
http://dspace.library.iitb.ac.in/jspui/handle/100/15392
 
Language en