Development and test of piezoelectric vibration calibrators to be used for frequency range above 10 kHz
Li-Feng Ge · The Journal of the Acoustical Society of America · 1988
Piezoelectric calibrators intended as vibration standards at frequencies higher than 10 kHz, based on the reciprocity method, have been developed and tested. Each calibrator is composed of a table, a two-disk active element, and a base. The first resonance frequency of the shakers is higher than 30 kHz; and the capacitance of the electrical port is about 10–15 nF. The design possesses many advantages, such as: simple structure, stable electrical and mechanical characteristics, low distortion, and good amplitude linearity. In particular, the electrical impedance changes resulting from mass load changes are sufficiently large and repeatable in the higher frequency range, 10–40 kHz, to permit accurate calibration by the piezoelectric reciprocity method.