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ERIC Number: EJ913707
Record Type: Journal
Publication Date: 2011-Feb
Pages: 21
Abstractor: As Provided
Reference Count: 0
ISBN: N/A
ISSN: ISSN-1092-4388
Effects of Age on Concurrent Vowel Perception in Acoustic and Simulated Electroacoustic Hearing
Arehart, Kathryn H.; Souza, Pamela E.; Muralimanohar, Ramesh Kumar; Miller, Christi Wise
Journal of Speech, Language, and Hearing Research, v54 n1 p190-210 Feb 2011
Purpose: In this study, the authors investigated the effects of age on the use of fundamental frequency differences([delta]F[subscript 0]) in the perception of competing synthesized vowels in simulations of electroacoustic and cochlear-implant hearing. Method: Twelve younger listeners with normal hearing and 13 older listeners with (near) normal hearing were evaluated in their use of [delta]F[subscript 0] in the perception of competing synthesized vowels for 3 conditions: unprocessed synthesized vowels (UNP), envelope-vocoded synthesized vowels that simulated a cochlear implant (VOC), and synthesized vowels processed to simulate electroacoustic stimulation (EAS) hearing. Tasks included (a) "multiplicity," which required listeners to identify whether a stimulus contained 1 or 2 sounds and (b) "double-vowel identification," which required listeners to attach phonemic labels to the competing synthesized vowels. Results: Multiplicity perception was facilitated by [delta]F[subscript 0] in UNP and EAS but not in VOC, with no age-related deficits evident. Double-vowel identification was facilitated by [delta]F[subscript 0], with [delta]F[subscript 0] benefit largest in UNP, reduced in EAS, and absent in VOC. Age adversely affected overall identification and [delta]F[subscript 0] benefit on the double-vowel task. Conclusions: Some but not all older listeners derived [delta]F[subscript 0] benefit in EAS hearing. This variability may partly be due to how listeners are able to draw on higher-level processing resources in extracting and integrating cues in EAS hearing.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A