The reference for the paper regarding voice classification by palate is as follows:
Marunick, Mark T. 2000. Maxillary Dental Arch Form Related to Voice Classification: A Pilot Study. Journal of Voice, March: 82-91
I haven't yet read the paper, so I am summarising from the abstract. The subjects were 9 female professional singers aged 26 to 53. Their voices were classified as soprano, mezzo or alto, from audio recordings, using speaking fundamental frequency, spectral analysis, voice profile, and tessitura. The researchers measured two widths and two depths (A=from first molar, B=from first bicuspid) of each subject's palate; they also made casts to determine the volume by fluid displacement. To quote the abstract, "the discriminant analysis revealed that no single measurement is a predictor for voice classification. However, the discriminant analysis applied to the predictors depth A, depth B, and volume gives optimal results, ie, each subject was classified in her true group."
Sally
(PS: Thank you for the welcome back, Cindy. I have missed Vocalist and look forward to renewing old friendships.)
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