The invention relates to an anechoic tile based on a
composite material, in particular to an anechoic tile made of a foam
metal material and a rare-earth supermagnetostrictive material, and belongs to the technical field of anechoic. It is composed of foamed
metal material sheet with certain
radian and thickness,
rare earth super magnetostrictive material sheet, and
synthetic rubber sheet which is vulcanized and packaged into an integral structure after they are bonded to each other. The shapes of the
metal foam material sheet and the
rare earth super magnetostrictive material sheet are consistent, and their radians are consistent with the surface
radian of the
underwater moving body. After being encapsulated by a
synthetic rubber sheet, they jointly form an anechoic tile. The invention can not only absorb the sound
waves of the active
sonar, significantly reduce the reflection intensity of the sound
waves of the active
sonar, but also suppress the vibration generated by the
underwater moving body itself, isolate the
machine noise in the
underwater moving body from radiating to the underwater moving body, and significantly reduce the Self-
noise of underwater moving bodies, reducing the passive
sonar range of the detection side, etc.