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Contributions of fundamental frequen...

Bender, Brenda Kay.

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Contributions of fundamental frequency to speech intelligibility.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Contributions of fundamental frequency to speech intelligibility./
作者:	Bender, Brenda Kay.
面頁冊數:	195 p.
附註:	Source: Dissertation Abstracts International, Volume: 62-10, Section: B, page: 4506.
Contained By:	Dissertation Abstracts International62-10B.
標題:	Speech therapy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3029887
ISBN:	9780493426983

Contributions of fundamental frequency to speech intelligibility.
Bender, Brenda Kay.

Contributions of fundamental frequency to speech intelligibility. - 195 p.

Source: Dissertation Abstracts International, Volume: 62-10, Section: B, page: 4506.

Thesis (Ph.D.)--The University of Memphis, 2001.

Fundamental frequency (f0) aids in marking segmental features by providing cues for obstruent consonantal boundaries and vocalic segments, as well as anchoring formant spacing important for vowel recognition. Fundamental frequency also contributes to suprasegmental features by marking syllable stress, accent, emphasis, and intonation as well as aiding in word and syntactic boundary detection. A few studies have investigated the contribution of global f0 contours to speech intelligibility by synthetically manipulating f0. These studies have shown a 13% to 34% decrease in speech intelligibility due to a reduced f0 contour. However, all of these studies suffer from serious methodological limitations.

ISBN: 9780493426983Subjects--Topical Terms:

520446
Speech therapy.

Contributions of fundamental frequency to speech intelligibility.
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100 1 $a Bender, Brenda Kay. $3 3185188
245 1 0 $a Contributions of fundamental frequency to speech intelligibility.
300 $a 195 p.
500 $a Source: Dissertation Abstracts International, Volume: 62-10, Section: B, page: 4506.
500 $a Major Professor: Michael P. Casnnito.
502 $a Thesis (Ph.D.)--The University of Memphis, 2001.
520 $a Fundamental frequency (f0) aids in marking segmental features by providing cues for obstruent consonantal boundaries and vocalic segments, as well as anchoring formant spacing important for vowel recognition. Fundamental frequency also contributes to suprasegmental features by marking syllable stress, accent, emphasis, and intonation as well as aiding in word and syntactic boundary detection. A few studies have investigated the contribution of global f0 contours to speech intelligibility by synthetically manipulating f0. These studies have shown a 13% to 34% decrease in speech intelligibility due to a reduced f0 contour. However, all of these studies suffer from serious methodological limitations.
520 $a Therefore, the purpose of this dissertation was to investigate the contributions of f0 to speech intelligibility in a carefully controlled study. Thirty sentence-length utterances produced by three healthy male speakers were presented both in a quiet and a noisy listening environment to thirty listeners without experience in listening to distorted or re-synthesized speech. Each utterance was manipulated and re-synthesized to produce a gradation of reduced f0 information across five conditions: (1) a control condition, (2) a 50% reduction in f0 variability, (3) a 70% reduction in f0 variability, (4) a flattened f0 condition, and (5) a no f0 condition.
520 $a A repeated measures ANOVA was used to analyze the listeners' responses and revealed main effects for listening conditions, f0 conditions, and speakers, as well as significant interactions for f0 condition by listening condition and speaker by listening condition. Post hoc analyses yielded significant differences between the f0 conditions and between speakers only in the noisy listening condition. Pairwise comparisons between the f 0 conditions in the noise condition revealed that the no f0 condition was significantly less intelligible than all other f0 conditions and the flattened f0 condition was significantly less intelligible than the control condition. Pairwise comparisons for the speakers in the noisy condition revealed that speaker A was significantly more intelligible than speakers B or C. These results indicated that f0 presents redundant acoustic information in optimal listening conditions. However, f 0 becomes important for speech intelligibility when more than one component of the speech chain is degraded (i.e., speaker and transmission environment).
590 $a School code: 1194.
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710 2 $a The University of Memphis. $3 1025952
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791 $a Ph.D.
792 $a 2001
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3029887