Abstract
The dependence of the pressure sensitivity of a tuning-fork-shaped quartz oscillator on its size has been studied experimentally and theoretically. It was experimentally found that the oscillator has a maximum pressure sensitivity when the ratio of the thickness to the length is about 0.1, and the maximum sensitivity is approximately proportional to the length (or the thickness). These results were theoretically analyzed on the basis of the string-of-beads model of a quartz oscillator. The theoretical results strongly suggest that the energy dissipation takes place mainly in the thin film metal electrodes on the surface of the quartz.
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