Wideband underwater acoustic absorption and transmission material and preparation method thereof

Abstract

The invention discloses a wideband underwater acoustic absorption and transmission material and a preparation method thereof. The wideband underwater acoustic absorption and transmission material is prepared by adhering and compounding an acoustic absorption layer with the thickness of 2-5 mm and an acoustic transmission layer with the thickness of 10-15 mm, the acoustic transmission layer is prepared from the following components in parts by weight: 100 parts of chlorinated butyl rubber, 20-40 parts of carbon black, 5-10 parts of calcium carbonate, 5 parts of dioctyl sebacate, 5-35 parts of zinc oxide, 5-35 parts of stearic acid, 0.5-1.5 part of age resister D, 0.5-1.5 parts of accelerant TMTD (Tetramethylthiuram Disulfide) and 0.5-2.0 parts of sulfur; and the acoustic absorption layer is prepared from the following components in percentage by weight: 100 parts of chlorinated butyl rubber, 20-40 parts of carbon black, 5-10 parts of calcium carbonate, 5 parts of dioctyl sebacate, 5-35parts of zinc oxide, 5-35 parts of stearic acid, 0.5-1.5 part of age resister D, 0.5-1.5 parts of accelerant TMTD, 0.5-2.0 parts of sulfur and 0.5-2.0 parts of zinc powder or iron powder. The underwater acoustic absorption and transmission rubber material has excellent physical mechanical performance as well as and acoustic transmission and absorption characteristics and can be used for researching a special underwater acoustic frequency band.

Description

technical field [0001] The invention relates to a technology in the field of underwater acoustic materials, in particular to a wide-band underwater sound-absorbing sound-transmitting material and a preparation method thereof. Background technique [0002] Underwater acoustic materials generally include sound-transmitting, sound-absorbing, and sound-insulating materials, and are mainly used for underwater equipment and acoustic transducers. According to different application environments, these types of materials generally play their respective roles in their exclusive application fields. At present, there are no reports on materials that include sound transmission and sound absorption properties at the same time. Filtering for studying specific hydroacoustic frequency bands. [0003] The Chinese patent with the publication number CN200997679 discloses a sound-transmitting dome. The sound-transmitting material is a polyurethane rubber-type material, which has good sound-perm...

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Problems solved by technology

[0005] However, the disadvantages of the above technologies are that each material or product has only a single function, sound transmission or sound absorption, and materials that include these two functions have not been reported yet. There is an urgent need for a low-frequency sound transmission, high-frequency Materials with sound-absorbing characteristics

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