A Laminagraphic Study of Vocal Pitch

Hollien, Harry; Curtis, James F.

doi:10.1044/jshr.0304.361

Cited by 48 publications

(20 citation statements)

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“…The IS values for the input data in test 1 were the same or somewhat lower for higher fundamental frequencies, whereas for the input data in test 2 the maximum IS increased with F0 similarly as in the study [13] . This may be explained by the medial reduction of the vocal fold cross-section during pitch increase which was incorporated in test 2, based on the relationship of the data of Titze et al [19] and Hollien and Curtis [48] .…”

Section: Comparison Of Computed Results With Data From the Literaturementioning

confidence: 99%

Comparison of Acceleration and Impact Stress as Possible Loading Factors in Phonation: A Computer Modeling Study

Horáček

Laukkanen

Šidlof

et al. 2009

Folia Phoniatr Logop

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Impact stress (the impact force divided by the contact area of the vocal folds) has been suspected to be the main traumatizing mechanism in voice production, and the main cause of vocal fold nodules. However, there are also other factors, such as the repetitive acceleration and deceleration, which may traumatize the vocal fold tissues. Using an aeroelastic model of voice production, the present study quantifies the acceleration and impact stress values in relation to lung pressure, fundamental frequency (F0) and prephonatory glottal half-width. Both impact stress and acceleration were found to increase with lung pressure. Compared to impact stress, acceleration was less dependent on prephonatory glottal width and, thus, on voice production type. Maximum acceleration values were about 5–10 times greater for high F0 (approx. 400 Hz) compared to low F0 (approx. 100 Hz), whereas maximum impact stress remained nearly unchanged. This suggests that acceleration, i.e. the inertia forces, may present at high F0 a greater load for the vocal folds, and in addition to the collision forces may contribute to the fact that females develop vocal fold nodules and other vocal fold traumas more frequently than males.

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Section: Comparison Of Computed Results With Data From the Literaturementioning

confidence: 99%

Comparison of Acceleration and Impact Stress as Possible Loading Factors in Phonation: A Computer Modeling Study

Horáček

Laukkanen

Šidlof

et al. 2009

Folia Phoniatr Logop

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“…First notable studies regarding vocal fold geometry were published in the 1960s by Hollien and Curtis (1960), Hollien et al (1968), Hollien and Colton (1969) vocal fold cross-sectional area and thickness in vivo with the aid of X-ray laminagraphy. Despite the technological progress in medical imaging techniques in the last decades, the standard non-invasive 3D imaging methods such as CT or MRI have been problematic to use for the purposes of capturing and measuring the phonatory geometry of the vocal folds in living human subjects.…”

Section: Introductionmentioning

confidence: 99%

Geometry of human vocal folds and glottal channel for mathematical and biomechanical modeling of voice production

Šidlof¹,

Švec²,

Horáček³

et al. 2008

Journal of Biomechanics

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“…Variations of vocal fold thickness and length as a function of F 0 were given by Hollien (1962), Hollien and Colton (1969), Hollien and Curtis (1960), Hollien and Moore (1960), and Nishizawa, Sawashima, and Yonemoto (1988). From these measurements, two empirical relations for thickness have been extracted:…”

Section: Empirical Findings On Amplitude Thickness and Viscositymentioning

confidence: 99%

Vocal Dose Measures

Titze

Švec

Popolo

2003

J Speech Lang Hear Res

216

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To measure the exposure to self-induced tissue vibration in speech, three vocal doses were defined and described: distance dose, which accumulates the distance that tissue particles of the vocal folds travel in an oscillatory trajectory; energy dissipation dose, which accumulates the total amount of heat dissipated over a unit volume of vocal fold tissues; and time dose, which accumulates the total phonation time. These doses were compared to a previously used vocal dose measure, the vocal loading index, which accumulates the number of vibration cycles of the vocal folds. Empirical rules for viscosity and vocal fold deformation were used to calculate all the doses from the fundamental frequency (F 0 ) and sound pressure level (SPL) values of speech. Six participants were asked to read in normal, monotone, and exaggerated speech and the doses associated with these vocalizations were calculated. The results showed that large F 0 and SPL variations in speech affected the dose measures, suggesting that accumulation of phonation time alone is insufficient. The vibration exposure of the vocal folds in normal speech was related to the industrial limits for hand-transmitted vibration, in which the safe distance dose was derived to be about 500 m. This limit was found rather low for vocalization; it was related to a comparable time dose of about 17 min of continuous vocalization, or about 35 min of continuous reading with normal breathing and unvoiced segments. The voicing pauses in normal speech and dialogue effectively prolong the safe time dose. The derived safety limits for vocalization will likely require refinement based on a more detailed knowledge of the differences in hand and vocal fold tissue morphology and their response to vibrational stress, and on the effect of recovery of the vocal fold tissue during voicing pauses.Keywords voice accumulation; voice dosimetry; vocal fold oscillation; heat dissipation; safety limits Excessive vibration of vocal fold tissues due to loud or prolonged vocalization has been assumed to contribute to development of voice disorders and presents a significant health concern. For the last two decades, there has been considerable effort to measure the amount of voicing performed by speakers over time. Devices designated as "voice accumulators"

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A Laminagraphic Study of Vocal Pitch

Cited by 48 publications

References 0 publications

Comparison of Acceleration and Impact Stress as Possible Loading Factors in Phonation: A Computer Modeling Study

Comparison of Acceleration and Impact Stress as Possible Loading Factors in Phonation: A Computer Modeling Study

Geometry of human vocal folds and glottal channel for mathematical and biomechanical modeling of voice production

Vocal Dose Measures

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