Computer-Aided Technique for Automatic Determination of the Relationship between Transglottal Pressure Change and Voice Fundamental Frequency

Deguchi, Shinji; Kawashima, Kazutaka; Washio, Seiichi

doi:10.1177/000348940811701202

Cited by 1 publication

(1 citation statement)

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“…The vocal frequency in falsetto phonation is simply and effectively regulated by the single muscle activation as described by Eqs. (15) and (16), consistent with experimental reports that the frequency is highly sensitive to the muscle activity (Deguchi and Kawashima, 2008;Riede, 2011). In contrast, cooperative activations of the two muscles are necessary for modal phonation (Titze, 1994;.…”

Section: Similarity Of Physical Mechanisms Between Human and Other Ansupporting

confidence: 87%

A possible common physical principle that underlies animal vocalization: theoretical considerations with an unsteady airflow-structure interaction model

Deguchi

2016

JBSE

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We previously described an analytical model regarding how human falsetto voice is produced upon interaction between the respiratory airflow and vocal fold motion. This theory highlights the role of an unsteady flow effect-or specifically, convective acceleration of wall motion-induced flow-in inducing a Hopf bifurcation or aerodynamic flutter of vocal folds, reminiscent of falsetto voice production. Importantly, the mucosal wave motion and glottal closure of the vocal folds-typically observed in human modal voice production but absent in falsetto vocalization of high voice pitch-are dispensable in this analytical model. Thus, given its rigorous applicability to high-pitched vocalization, our model may function as a universal physical mechanism underlying the vocalization of not only humans but also other diverse vertebrate animals that share a basic anatomical design. Here we show that the relationship between the vocal frequency and animal body size and mass, derived from the present model, captures the actual features reported elsewhere, thus suggesting that the allometric scaling of animal vocalization is explained theoretically. Moreover, the critical biomechanical conditions that induce the vocalization are rewritten to highlight an intriguing consequence from our model that the voice pitch can be controlled simply and extensively with the mechanical tension in vocal membranes. Furthermore, several dimensionless numbers that characterize the aerodynamic flutter are introduced to shed light on the physical essence of the possible universal mechanism underlying vertebrate animal vocalization: whether the animal prefers to falsetto or modal vocalization is determined by its communication frequency.

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Section: Similarity Of Physical Mechanisms Between Human and Other Ansupporting

confidence: 87%

A possible common physical principle that underlies animal vocalization: theoretical considerations with an unsteady airflow-structure interaction model

Deguchi

2016

JBSE

Self Cite

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Computer-Aided Technique for Automatic Determination of the Relationship between Transglottal Pressure Change and Voice Fundamental Frequency

Abstract: The proposed technique overcomes the difficulty in automatic determination of the voice F0, which tends to be transient both in normal voice and in some types of pathological voice.

Cited by 1 publication

References 15 publications

A possible common physical principle that underlies animal vocalization: theoretical considerations with an unsteady airflow-structure interaction model

A possible common physical principle that underlies animal vocalization: theoretical considerations with an unsteady airflow-structure interaction model

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