Piezoelectric Unimorphs Dynamic Response Measurement

Abstract

The paper deals with the experimental methods of determination of piezoelectric unimorph resonant frequencies essential for a design of acoustical systems. The characterization of piezoelectric unimorphs and their significant properties are brought in. Three broadband methods of determination of unimorph frequency response based on measurement of electrical impedance, acoustic pressure and vibration velocity are presented. The supposed methodology is verified by measurement of three unimorph samples. The efficiency and practical applicability of each method are further discussed.