The effect of better-ear glimpsing on spatial release from masking

Glyde, Helen, Buchholz, Jorg, Dillon, Harvey, Best, Virginia, Hickson, Louise and Cameron, Sharon (2013) The effect of better-ear glimpsing on spatial release from masking. Journal of the Acoustical Society of America, 134 4: 2937-2945. doi:10.1121/1.4817930

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Author Glyde, Helen
Buchholz, Jorg
Dillon, Harvey
Best, Virginia
Hickson, Louise
Cameron, Sharon
Title The effect of better-ear glimpsing on spatial release from masking
Journal name Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
1520-8524
Publication date 2013-10-01
Year available 2013
Sub-type Article (original research)
DOI 10.1121/1.4817930
Open Access Status File (Publisher version)
Volume 134
Issue 4
Start page 2937
End page 2945
Total pages 9
Place of publication Melville, NY United States
Publisher A I P Publishing LLC
Language eng
Subject 3102 Acoustics and Ultrasonics
1201 Architecture
Abstract The current experiment investigated whether better-ear glimpsing can explain the spatial release achieved by normal-hearing adults when situations are high in informational masking. Both modeling and behavioral methods were used. The speech reception thresholds of 38 young adults were measured for co-located, spatially separated and two better-ear glimpsed conditions. In the better-ear glimpsed conditions the binaural signals were processed so that in each time-frequency segment, the signal with the better SNR (left or right ear) was presented diotically. To investigate the effect of widening auditory filters on better-ear glimpsing, adjacent frequency bands were combined in one of the better-ear glimpsing conditions. Twenty-two participants were tested with maskers high in informational masking, while 16 participants were tested with maskers lower in informational masking. The mean speech reception thresholds achieved in the glimpsed conditions were significantly worse than in the spatially separated condition. This suggests that better-ear glimpsing can explain some but not all of the observed spatial release from masking. The difference between performance in the spatially separated and glimpsed conditions was largest when informational masking was high, suggesting better-ear glimpsing may release energetic rather than informational masking. Reducing the number of frequency bands sampled had a small effect on performance.
Keyword Acoustics
Audiology & Speech-Language Pathology
Acoustics
Audiology & Speech-Language Pathology
ACOUSTICS
AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Health and Rehabilitation Sciences Publications
 
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