| 1. |
- Lamarche, Anick, et al.
(författare)
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An Exploration of Skin Acceleration Level as a Measureof Phonatory Function in Singing
- 2008
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Ingår i: Journal of Voice. - : Elsevier BV. - 0892-1997 .- 1873-4588. ; 22:1, s. 10-22
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Tidskriftsartikel (refereegranskat)abstract
- Summary: Two kinds of fluctuations are observed in phonetogram recordingsof singing. Sound pressure level (SPL) can vary due to vibrato and also due tothe effect of open and closed vowels. Since vowel variation is mostly a consequence of vocal tract modification and is not directly related to phonatory function, it could be helpful to suppress such variation when studying phonation. Skin acceleration level (SAL), measured at the jugular notch and on the sternum, might be less influenced by effects of the vocal tract. It is explored in this study as an alternative measure to SPL. Five female singers sang vowel series on selected pitches and in different tasks. Recorded data were used to investigate two null hypotheses: (1) SPL and SAL are equally influenced by vowel variation and (2) SPL and SAL are equally correlated to subglottal pressure (PS). Interestingly, the vowel variation effect was small in both SPL and SAL. Furthermore, in comparison to SPL, SAL correlated weakly to PS. SAL exhibited practically no dependence on fundamental frequency, rather, its major determinant was the musical dynamic. This results in a non-sloping, square-like phonetogram contour. These outcomes show that SAL potentially can facilitate phonetographic analysis of the singing voice.
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| 2. |
- Lamarche, Anick, 1977-, et al.
(författare)
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Not Just Sound II : an Investigation of Singer patient Self-Perceptions Mapped into the Voice Range Profile
- 2008
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Ingår i: Journal of Speech, Language and Hearing Research. - 1092-4388 .- 1558-9102.
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Purpose: In aiming at higher specificity in clinical evaluations of the singing voice, singer perceptions were included and tested in conjunction with the voice range profile. Method: The use of a commercial phonetograph supplemented by a hand-held response button was clinically tested with 13 subjects presenting voice complaints. Singer patients were asked to press a button to indicate sensations of vocal discomfort or instability during phonation. Each press was registered at the actual position in the Voice Range Profile (VRP) so as to mark areas of difficulty. Consistency of button press behavior was assessed with a method developed previously. Results: In spite of their voice complaints, subjects did not press the button as much as healthy singers. Like healthy singers, the singer-patient group demonstrated consistent behavior but tended to press the button in completely different areas of the VRP space. The location of the presses was dominantly in the interior of the VRP and concentrated to a small fundamental frequency range. An extensive discussion examines carefully the reasons for such outcomes. Conclusion: The button augmented VRP could be a well needed resource for clinicians but requires further development and work.
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