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PERCEPTUAL COHERENCE IN LISTENERS WITH HEARING LOSS

Award Number: R03DC006573
ORGANIZATION: NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: HEALTH SERVICES
PERIOD OF PERFORMANCE START DATE: 01/01/2004
PERIOD OF PERFORMANCE END DATE: 12/31/2006

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PERCEPTUAL COHERENCE IN LISTENERS WITH HEARING LOSS - DESCRIPTION (provided by applicant): The overall goal of this project is to gain information regarding the ability of hearing-impaired adults to group the many acoustic elements of speech into a coherent signal. This ability, termed perceptual coherence, is thought to be a fundamental aspect of speech perception, in which acoustic elements that share a common characteristic are grouped together and perceived as a single auditory event. During speech perception, for example, the vowel formants of a single talker may be grouped together by the common fundamental frequency. In normal-hearing adults, perceptual coherence has been found to promote the perception of speech in noise, including a background of multiple talkers. Although a number of studies have characterized the coherence of nonspeech stimuli in hearing impaired adults, the relation between perceptual coherence of speech and the characteristics of hearing loss has not been determined. The first aim of this project is to test the hypothesis that perceptual coherence of speech is poorer in hearing-impaired listeners relative to normal-hearing listeners and that coherence is reduced as a function of degree hearing loss. Results of this study should allow us to characterize the relation between hearing loss and perceptual coherence. The second aim is to test the hypothesis that low frequency acoustic information contributes significantly to the perceptual coherence of speech. This hypothesis is based on pilot data, which suggests that coherence decreases as hearing thresholds at 250 and 500 Hz increase. The results of this study should provide insight into the relative importance of low-frequency spectral and temporal information to the perception of speech. The third aim is to test the hypothesis that perceptual coherence is related to a listener's ability to perceive speech in noise. These results may improve our understanding of why hearing-impaired listeners have difficulty perceiving speech in degraded listening environments.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2006 ( Subtotal = $72,993 )
2006	2006	ARIZONA STATE UNIVERSITY	BOX 873503	TEMPE	AZ	85287	MARICOPA	USA	Research Related to Deafness and Communication Disorders	000	4	12/23/2005	NON-COMPETING CONTINUATION	$72,993
														Subtotal = $72,993

Issue Date FY: 2005 ( Subtotal = $74,750 )
2005	2005	ARIZONA STATE UNIVERSITY	BOX 873503	TEMPE	AZ	85287	MARICOPA	USA	Research Related to Deafness and Communication Disorders	000	3	12/10/2004	NON-COMPETING CONTINUATION	$74,750
														Subtotal = $74,750

Issue Date FY: 2004 ( Subtotal = $72,039 )
2004	2004	ARIZONA STATE UNIVERSITY	BOX 873503	TEMPE	AZ	85287	MARICOPA	USA	Research Related to Deafness and Communication Disorders	000	2	8/13/2004	CHANGE OF GRANTEE / TRAINING INSTITUTION / AWARDING INSTITUTION	$29,541
2004	2004	FATHER FLANAGAN'S BOYS' HOME	14100 CRAWFORD STREET	BOYS TOWN	NE	68010	DOUGLAS	USA	Research Related to Deafness and Communication Disorders	000	1	1/1/2004	NEW	$42,498
														Subtotal = $72,039

Grand Total All Awards = $219,782

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PERCEPTUAL COHERENCE IN LISTENERS WITH HEARING LOSS

Award Number: R03DC006573

ORGANIZATION: NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: HEALTH SERVICES

PERIOD OF PERFORMANCE START DATE: 01/01/2004

PERIOD OF PERFORMANCE END DATE: 12/31/2006

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