Measurement of the viscosity of liquids by near-field acoustics
- 1 November 1998
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 9 (11) , 1894-1898
- https://doi.org/10.1088/0957-0233/9/11/015
Abstract
We have studied the relationship between the acoustic properties of a near-field acoustic sensor and the properties of a liquid. An acoustic stepped horn is driven by two piezoelectric elements. The generated acoustic waves cause the solid horn to resonate and an acoustic load at the tip modifies these oscillation modes. This leads to a change in electric impedance at the piezoelectric elements. This sensitivity to acoustic load allows a study of semi-infinite liquids. We found a relation between the resonance frequency and the liquid density and a relation between the electric impedance and the viscosity.Keywords
This publication has 2 references indexed in Scilit:
- Optimizing the performance of piezoelectric drivers that use stepped hornsThe Journal of the Acoustical Society of America, 1991
- Investigation of some low ultrasonic absorption liquidsThe Journal of the Acoustical Society of America, 1976