# Engineering Mechanics

Proceedings Vol. 32 (2026)

ENGINEERING MECHANICS 2026

Copyright © 2026 Institute of Thermomechanics of the Czech Academy of Sciences, Prague

 

Horáček J., Radolf V., Švec J.G., Laukkanen A.-M.
pages 53 - 56, full text

This preliminary study measures the facial vibrations using accelerometric and vibrometric sensors placed on the positions where the vibrations were observed. From acceleration and velocity, the RMS values of displacement were obtained and their spectra were studied. One female with singing background was studied when phonating syllable strings on [pa:], [pi:] and [pu:] in speaking voice using resonant and non-resonant voice qualities. Acoustic signal, oral air pressure and electroglottogram (EGG) were also registered. The results suggested that the facial vibrations are dominantly excited at the fundamental frequency f 0 by the acoustic signal, which is for the resonant voice rather associated with lowering the first formant frequency by prolongation of the vocal tract.

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