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This paper introduces the principle of sonar and the basic equation of sonar, and the extensive application of sonar equation in marine instruments. By knowing the basic parameters of ultrasonic transducer, the parameters of the function of the instrument are calculated, such as the loss of sound wave propagation and the intensity of the target in the sonar equation. Finally, the minimum electric power required in the design of the marine instrument is calculated.

Application of Sonar Equation in the Design Of Ocean Instruments