CPC H03H 9/2457 (2013.01) [H03H 9/1057 (2013.01)] | 16 Claims |
1. A resonance device comprising:
a lower cover;
an upper cover joined to the lower cover;
a resonator having a vibrating arm that bends and vibrates in a vibration space between the lower cover and the upper cover; and
a particle attached to a tip portion of the vibrating arm, wherein
when a median size of the particle is defined as D50, a specific gravity of the particle is defined as A, and a resonant frequency of the resonator is defined as X, D50≤189/(X×√A).
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