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Acoustic and perceptual effects of c...

DeMerit, Jean L.

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Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts./
Author:	DeMerit, Jean L.
Description:	142 p.
Notes:	Source: Dissertation Abstracts International, Volume: 58-06, Section: A, page: 2181.
Contained By:	Dissertation Abstracts International58-06A.
Subject:	Language, Linguistics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9724096
ISBN:	0591467240

Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts.
DeMerit, Jean L.

Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts. - 142 p.

Source: Dissertation Abstracts International, Volume: 58-06, Section: A, page: 2181.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 1997.

This study investigates acoustic and perceptual effects of clear speech, focused on three duration-dependent vowel contrasts in American English, /

ISBN: 0591467240Subjects--Topical Terms:

1018079
Language, Linguistics.

Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts.
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100 1 $a DeMerit, Jean L. $3 1908375
245 1 0 $a Acoustic and perceptual effects of clear speech on duration-dependent vowel contrasts.
300 $a 142 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-06, Section: A, page: 2181.
500 $a Supervisor: W. Charles Read.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 1997.
520 $a This study investigates acoustic and perceptual effects of clear speech, focused on three duration-dependent vowel contrasts in American English, / $\ varepsilon, $ ae/, / $\ Lambda,\ \alpha $/ and / scI, i/. Eight female native speakers produced the vowels in two consonantal contexts under two speech style conditions, conversational versus clear. A querying technique was used in which the speakers were engaged in a conversation-like task.
520 $a Measurements of vowel duration and formant frequency were made. For each vowel, duration was significantly longer in clear speech. However, only one vowel pair, / $\ varepsilon, $ ae/, indicated an increase in the durational contrast between the two vowels. In terms of clear speech effects on formant frequencies, F1 was significantly higher for the vowels of both the lower pairs while there was a significant increase in F2 for / scI, i/. With respect to the vowel contrasts, F1 increases were greater for / $\ alpha $/ than for / $\ Lambda $/ .
520 $a A perceptual test, using stimuli edited from the speakers' natural vowel productions, was employed to assess the relative importance of durational versus spectral changes with respect to improved identification of these vowels in clear speech. Two types of stimuli were created: silent-center stimuli, in which a large portion of the vowel nucleus was removed but transitional components remained in their original temporal positions, and fixed-center stimuli, which contained a central portion of the vowel nucleus of a single given duration.
520 $a The results suggest that--although speaking clearly yields improvements in listeners' vowel perception--these effects are dependent on the vowel category and individual speaker. In particular, only the long vowels showed overall identification improvements across speakers. There was no strong indication of a difference in the relative perceptual contributions of the durational and spectral consequences of clear speech. Connections between the perceptual outcomes and the observed changes in acoustic properties are discussed.
590 $a School code: 0262.
650 4 $a Language, Linguistics. $3 1018079
650 4 $a Psychology, Experimental. $3 517106
650 4 $a Speech Communication. $3 1017408
690 $a 0290
690 $a 0623
690 $a 0459
710 2 0 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 58-06A.
790 1 0 $a Read, W. Charles, $e advisor
790 $a 0262
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9724096