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JPS58146298

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DESCRIPTION JPS58146298
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a cross-sectional view of a conventional piezoelectric buzzer sounding device, FIG. 2 is a
cross-sectional view of a piezoelectric buzzer sounding device according to an embodiment of the
present invention, FIG. 3 is a sound pressure level-frequency characteristic diagram of the abovementioned conventional device, FIG. The figure is a sound pressure level-frequency characteristic
diagram of an embodiment of the present invention. 11 ииииии Piezoelectric buzzer, 12.13 иииииииии Lid,
14.16 иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Resonant space, 18 ии First resonator, 19 second
resonator.
04-05-2019
1
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