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Optimizing the comb filters for spectral splitting of speech to reduce the effect of spectral masking

DSpace at IIT Bombay

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Title Optimizing the comb filters for spectral splitting of speech to reduce the effect of spectral masking
 
Creator KULKAMI, PN
PANDEY, PC
 
Subject sensorineural hearing loss
spectral masking
spectral splitting
comb filters
binaural dichotic presentation
 
Description Sensorineural hearing impairment is associated with widening of auditory filters, resulting in poor frequency selectivity with an increased susceptibility to masking. Earlier studies have shown that binaural dichotic presentation, using critical bandwidth based spectral splitting with perceptually balanced comb filters, helps in reducing the effect of spectral masking for persons with moderate bilateral sensorineural hearing impairment. In spectral splitting, the speech signal is filtered using a pair of linear phase FIR comb filters with complementary magnitude responses for binaural dichotic presentation. The objective of the present study is to optimize the comb filters with respect to the number of bands and bandwidth. Three different pairs of comb filters are investigated: constant bandwidth filters, critical band based filters, and 1/3 octave bandwidth filters. Evaluation of spectral splitting schemes, using these filters, through listening tests, indicate that 1/3 octave band and critical band based filters are superior to constant bandwidth filters.
 
Publisher IEEE
 
Date 2011-10-25T23:31:48Z
2011-12-15T09:12:13Z
2011-10-25T23:31:48Z
2011-12-15T09:12:13Z
2008
 
Type Proceedings Paper
 
Identifier ICSCN 2008: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING COMMUNICATIONS AND NETWORKING,69-73
978-1-4244-1923-4
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15847
http://hdl.handle.net/100/2535
 
Source International Conference on Signal Processing, Communications and Networking,Chennai, INDIA,JAN 04-06, 2008
 
Language English