EFFECT OF THIN CYLINDRICAL-SHELL VIBRATION ON RESONANT-FREQUENCY OF CYLINDRICAL RESONATOR-TYPE SOUND SOURCE

In recent years, the need for a low-frequency acoustic source for ocea nic observation and long-distance propagation in the sea has been incr easing. Generally, the attenuation loss of low frequency acoustic wave s in water is very low compared to that of electromagnetic waves. Ther efore, the low-frequency acoustic wave is an attractive option for rem ote sensing, communications, and sonar in the ocean. Accordingly, from among various types of sound sources, a cylindrical resonator-type so und source was focused on because this type of transducer has the meri ts of being simple in terms of structure and employable in deep-sea ar eas. Also, the development of a cylindrical resonator-type sound sourc e with low Q, which is the acoustic quality factor, was attempted.