Patent ID: 8570836
Filing Date: 2013-10-29
Classification: B06B

Abstract:
1. An acoustic transducer comprising: a plurality of bending vibration modules which are arranged in a shape of a cylinder and each of which is constructed of at least one bending vibrator that is made of at least one plate-shaped piezoelectric vibrator and of at least one vibration plate; a plurality of support members which extend radially from a center of the bending vibration modules arranged in a shape of a cylinder and each of which is joined to an end portion of each of the vibration plates of the bending vibration modules adjacent to each other to thereby support the bending vibration module; end plates which close both end portions of the acoustic transducer, respectively; a cutout portion which is formed in an end portion of a part of the support members; and open apertures each of which is formed in each of the end plates and is made to communicate with the other open aperture via an acoustic emission generation part and the cutout portion, the acoustic emission generation part being constructed of two support members adjacent to each other and the bending vibration module.