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The article describes the design of an ultrasonic emitter for exposure to gas-dispersed media. A longitudinally oscillating cylindrical body of half-wave length, connected to a piezoelectric transducer, serves as the basis for the design of an ultrasonic emitter. The optimization of the geometric dimensions of the radiator made it possible to ensure the uniformity of the distribution of the vibration amplitudes of the radiating end surfaces. The execution of the connecting plane for excitation of vibrations, deepened relative to the end radiating surface, made it possible to increase the amplitude of vibrations by 2 times. Optimization of the design using the finite method made it possible to create a longitudinally oscillating ultrasonic emitter capable of providing exposure to gaseous media with an intensity of at least 145 dB at a power consumption of no more than 90 W.

In this article the method for indirect determination of the mechanical oscillations amplitude of ultrasonic transducers working tools through the measuring of input power of transducer is described is described. This method is used for automatically regulation systems. The application of indirect method provides the depart from special probes.

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