METHOD FOR CONVERTING ULTRASOUND WAVE AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2006 - IPC B06B1/06 B06B3/02 

FIELD: acoustics-electronics, ultrasonic technique.

SUBSTANCE: in controlled sound conduit 1 having length Ls and made of non-polarized ferroelectric ceramics with abnormally high dielectric permeability, ultrasonic wave with frequency ω₀ is passed. Said wave is formed by converter 4 and it interacts with electric field rotating around propagation direction of wave and generated as result of action of AC voltage supplied by means of generator 6 and phase splitter 7 upon pairs of electrodes 2, 3 arranged in sound conduit 1. Rotation frequency of electric field coincides with frequency of ultrasonic wave Ω = ω₀. According to invention it is realized resonance interaction of circular component of ultrasonic wave (whose frequency and rotation sign coincide with frequency and rotation sign of electric field having intensity more than threshold value) with such electric field. In the result ultrasound absorption is prevented and in outlet of sound conduit elliptically polarized ultrasonic wave is created with intensity more than that of said wave.

EFFECT: possibility for increasing intensity of ultrasonic wave passing through sound conduit.

2 cl, 3 dwg