| 摘要 |
PURPOSE:To improve prevention effect against noises from the bottom of a ship by fitting the columnar coupling material of a protecting device to the ship bottom through a rubber vibration insulator, mounting a sound shield material on the ship bottom, and covering the head part which contains a sonar transmitter and receiver with a rubber type elastic body. CONSTITUTION:The protecting device 3 which contains the sonar transmitter and receiver 17 is separated from and coupled with the ship bottom 1 through the columnar coupling material 13 which streamlined section. The device 3 is formed by joining the head part which contains the transmitter and receiver 17 with a tail part 12 made of a rigid body and the jacket of the head part is covered with the rubber elastic body 11 embedded in a fiber reinforcing material and isolated in a watertight state by a clamp 16 and a shield member 19. The upper end part of the coupling material 13 is fitted to the ship bottom 1 through the rubber vibration insulator 21 and the sound shield material 22 is mounted on the ship bottom 1. Air bubbles 24 are generated from an air discharge opening 23 to cover the ship bottom 1. Consequently, the prevention effect against noises from the ship bottom is improved without increase forward projection area.
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