earticle

영어

Marine mines are placed in major ports with high cargo volumes and military ports where naval vessels are anchored, and can pose a significant obstacle to naval operations. Thus, minesweeping is a very important operation to open up sea route for warships and merchant ships to enter and exit easily. This paper describes the design and testing of underwater speaker for sweeping acoustic mines. In order predict the performance of the underwater speaker, an acoustic analysis was performed with a unit force of 1N applied to the diaphragm. Then, the driving force and displacement were calculated to satisfy the target performance. Since acoustic testing using microphones can generate undesirable noise sources under anechoic conditions, the results of accelerometer measurements were converted to source levels to predict the results. During the land tests, a laser displacement sensor was simultaneously used to verify the validity of the accelerometer measurement results. Finally, marine testing confirmed that the full-frequency sound pressure levels of the underwater speaker satisfied the target performance.