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The relationship between increases i...

Blitman, Simeon T.

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The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions./
作者:	Blitman, Simeon T.
面頁冊數:	103 p.
附註:	Source: Dissertation Abstracts International, Volume: 68-06, Section: B, page: 3739.
Contained By:	Dissertation Abstracts International68-06B.
標題:	Health Sciences, Speech Pathology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3266536
ISBN:	9780549054856

The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions.
Blitman, Simeon T.

The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions. - 103 p.

Source: Dissertation Abstracts International, Volume: 68-06, Section: B, page: 3739.

Thesis (Ph.D.)--Columbia University, 2007.

This investigation examined the relationship between extrinsic laryngeal muscle force and extrinsic laryngeal muscle activity, acoustic output and human perception of vocal productions from adult participants with no vocal pathology. Participants completed a vowel (/a/) prolongation task at 0%, 25%, 50% and 75% of their maximum tension force (measured in volts) three times for five seconds at each level of tension. This was accomplished by having each participant apply a downward force on a chin cup device while watching a computer screen, which indicated when their target force was met. Extrinsic laryngeal muscle activity of the mylohyoid and sternohyoid muscles during the force procedure was measured with surface electromyography (EMG) for subsequent analysis. The voice samples from the vowel prolongation task were recorded and subsequently analyzed for the acoustic measurements of frequency perturbation, amplitude perturbation and harmonics to noise ratio. The recorded voice samples were also used for subsequent perceptual analysis by two trained raters using the grade, rough, breathy, asthenic, and strained (GRBAS) perceptual scale.

ISBN: 9780549054856Subjects--Topical Terms:

1018105
Health Sciences, Speech Pathology.

The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions.
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245 1 4 $a The relationship between increases in extrinsic laryngeal muscle force, extrinsic laryngeal muscle activity, acoustic parameters and perceptual characteristics of vocal productions.
300 $a 103 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-06, Section: B, page: 3739.
500 $a Adviser: John Saxman.
502 $a Thesis (Ph.D.)--Columbia University, 2007.
520 $a This investigation examined the relationship between extrinsic laryngeal muscle force and extrinsic laryngeal muscle activity, acoustic output and human perception of vocal productions from adult participants with no vocal pathology. Participants completed a vowel (/a/) prolongation task at 0%, 25%, 50% and 75% of their maximum tension force (measured in volts) three times for five seconds at each level of tension. This was accomplished by having each participant apply a downward force on a chin cup device while watching a computer screen, which indicated when their target force was met. Extrinsic laryngeal muscle activity of the mylohyoid and sternohyoid muscles during the force procedure was measured with surface electromyography (EMG) for subsequent analysis. The voice samples from the vowel prolongation task were recorded and subsequently analyzed for the acoustic measurements of frequency perturbation, amplitude perturbation and harmonics to noise ratio. The recorded voice samples were also used for subsequent perceptual analysis by two trained raters using the grade, rough, breathy, asthenic, and strained (GRBAS) perceptual scale.
520 $a Results were that as extrinsic laryngeal muscle force increased extrinsic laryngeal muscle activity of the mylohyoid and sternohyoid muscles increased significantly in a linear manner. Frequency perturbation increased significantly in a linear manner as force increased. No significant relationship was found for amplitude perturbation as force increased. Harmonics to noise ratio decreased significantly as force increased for the linear component and the quadratic component. Perceptual judgments of Grade, Rough, Breathy, Asthenic, and Strained increased significantly in a linear manner as force increased. These results support the conclusion that increases as small as 25 percent force by the extrinsic laryngeal muscles above resting levels leads to muscle EMG activity (tension) which in turn, is translated into measurable disruptions in normal phonation sufficient to be perceived as dysphonic.
590 $a School code: 0054.
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