| 摘要 |
In a preferred embodiment, a flexural plate sound transducer (Figure 3, 150) , including: a housing (152) having an open central volume (172); a flexural plate (154) attached around an inner surface of the housing (152) and extending across the central volume (172); at least one piezoelectric elemen t (162, 164) attached to a surface of the flexural plate (154); and a mechanic al hinge (194) formed in the flexural plate (154) and extending around the flexural plate (154) near an outer periphery thereof, the mechanical hinge (194) being formed such as to cause the flexural plate (154) to move in a substantially piston-like manner when the piezoelectric element (162, 164) i s energized.
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