Microcontroller 14, which can be used in particular as a source of acoustic waves to the marine applications in -

摘要

The electroacoustic transducer has a structure of the tonpilz "type, that is - to - say comprising a horn antenna 10, a rear mass 20 and a motor formed of at least one piezoelectric element 30 is interposed between the horn and the rear mass and electrically excited so as to produce a vibration transmitted to the roof. / p & & p & the piezoelectric element is subjected to an electric field in a direction perpendicular to the main direction of polarization of the piezoelectric material, so as to be made to work that - ci in shear, 1 / p & & p & according to the invention: - the roof and the rear mass are terminated in the form of a rectilinear base 11 and the other in the form of a u houses the foot, between the rectilinear limbs 21, the foot and the branches extending parallel to the longitudinal direction δ of the transducer, and; - the motor is formed by the piezoelectric elements substantially parallelepipedic placed between the facing faces of the foot and of each branch, these elements being provided with electrodes 36, 36 ′, thereby creating an electric field parallel to said longitudinal direction, and the shape of the piezoelectric elements being chosen so as to favor the deformation of the piezoelectric material essentially in the longitudinal direction. / p & & p & this configuration makes it possible to reduce considerably the resonance frequency of the assembly, with a volume and mass and a small volume of piezoelectric material.