1962•The Journal of the Acoustical Society of AmericaRequires access

Measurement of Small Values of Electromechanical-Coupling Coefficient in Piezoelectric Transducers

Kimio Shibayama

Abstract

The electromechanical-coupling coefficient of a piezoelectric transducer k is usually derived from the difference between resonance and antiresonance frequencies for a particular mode. However, if the mechanical Q of the transducer Qm is low, i.e., k2Qm < 2, this relationship breaks down. The region k <20% and 100

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Key concepts: Antiresonance, Electromechanical coupling coefficient, Transducer, Piezoelectricity, Acoustics, Electrical impedance, Coupling coefficient of resonators, Resonance (particle physics)