Multiband Electrical Equivalent of a Powerful Low-Frequency Hydroacoustic Transducer

Abstract

The application of electrical equivalents of transducers reduces the cost and time of development of matching devices for testing and tuning excitation systems when creating high-power low-frequency emitting structures that radiate signals with an acoustic-power level of hundreds and thousands of watts in a frequency range of up to 1000 Hz. Hydroacoustic transducer is a combination of mechanical and electrical oscillatory systems in which electrical energy is converted into mechanical energy and acoustic wave radiation. Thus, the transducer cannot be reduced to an equivalent circuit in the form of a generalized electrical circuit with only one resonant frequency band, as is generally accepted. Due to the variety of physical processes occurring during electroacoustic transformation in hydroacoustic emitters, it is necessary to use multiband electrical equivalents of emitters to simulate the emission of sound signals. This paper presents the results of measuring the electrical impedances of multi-resonant electrical equivalents of high-power low-frequency hydroacoustic radiators. The tested model of the dual-band electrical equivalent of a high-power hydroacoustic emitter is manufacturable, meets the necessary electrical strength, and provides simulation of the emission of hydroacoustic signals with an acoustic power of more than 150 W.