Numéro |
J. Phys. IV France
Volume 04, Numéro C5, Mai 1994
3ème Congrés français d'acoustique3rd French conference on acoustics |
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Page(s) | C5-1205 - C5-1208 | |
DOI | https://doi.org/10.1051/jp4:19945266 |
3ème Congrés français d'acoustique
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1205-C5-1208
DOI: 10.1051/jp4:19945266
GIP Ultrasons, Faculté de Médecine, Laboratoire de Biophysique Médicale, Bâtiment Vialle, 2 bis boulevard Tonnellé, BP. 3223, 37032 Tours cedex, France
© EDP Sciences 1994
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1205-C5-1208
DOI: 10.1051/jp4:19945266
Impédance acoustique d'un liquide à la surface d'un quartz coupe AT
L. TESSIER, M. LETHIECQ, D. CERTON and F. PATATGIP Ultrasons, Faculté de Médecine, Laboratoire de Biophysique Médicale, Bâtiment Vialle, 2 bis boulevard Tonnellé, BP. 3223, 37032 Tours cedex, France
Abstract
The Shear acoustic impedance of a liquid can be determined from the complex reflection coefficient of the acoustic wave incident on the AT-cut quartz/liquid interface. This complex acoustic coefficient is related to the down shift of the resonant frequency as well as the decrease of the quality factor, due to the liquid load. The effective acoustic impedance measured with the thickness shear mode resonator is shown to be composed of three main components : a preponderant complex component due to viscous coupling between the quartz and the liquid, a pure imaginary additional component due to liquid trapped in the surface irregularities and a pure real additional component due to compressional wave generation in the bulk liquid.
© EDP Sciences 1994