| 摘要 |
PURPOSE:To expand sound pressure by using a Helmholtz resonator of balancing type and further providing a displacement expanding mechanism in a piston vibrating type piezoelectric transducer. CONSTITUTION:The displacement expanding mechanism comprising a lever 22 and a hinge 21 is provided in the piston motion type piezoelectric transducer using the Helmholtz resonator 25. Since the sufficient displacement of vibration is attained in a piston rigid body 24 in addition to the low frequency design in this transducer, the transducer with high power at a low frequency is realized. |
