Multi-frequency sound absorption device suitable for cargo ship compartment

Abstract

The invention discloses a multi-frequency sound absorption device suitable for cargo ship compartment. The device comprises a sound absorption plate formed by assembling a plurality of assembly profiles, each assembly profile comprises a sound absorption assembly arranged on the inner side of a mounting plate, a plurality of clamping buckles are arranged on the circumferential side face of the mounting plate, a groove is formed in the inner side face of the mounting plate, and the sound absorption assembly is slidably connected to the inner side of the groove. Each sound absorption assembly comprises a sliding plate and a fixed plate which are arranged on the inner side of the mounting plate up and down, a plurality of first through holes are formed in the surface of the sliding plate, a plurality of second through holes are formed in the surface of the fixed plate, the first through holes and the second through holes are correspondingly matched, adjusting plates are arranged in the first through holes and the second through holes, and the top ends of the adjusting plates are connected to the inner side faces of the first through holes through hinge pieces. The bottom ends of the adjusting plates are connected to the inner side faces of the second through holes through rotating shafts. The noise is completely absorbed by utilizing the structural property of noise elimination of sound absorption wedges, a traditional sound insulation treatment mode is replaced, and a better noise reduction effect is achieved.

Description

technical field [0001] The invention relates to the technical field of noise reduction for cargo ship compartments, in particular to a multi-frequency sound absorption device suitable for cargo ship compartments. Background technique [0002] Uncomfortable sounds made by the ship's power machinery and auxiliary machinery in operation. Ship noise is related to the safety of sailing. For example, if the noise level on the bridge is too high, it will affect the command. If the noise in the sonar dome is too high, it will seriously affect the normal operation of sonar equipment and interfere with the detection of underwater targets by sonar. The underwater noise of the submarine will give the enemy an indication of the detection target. Ship noise will also affect the health of passengers and passengers and the comfort of the environment. There are three main ways of ship noise transmission, air noise, structure noise and radiation noise. It is the mechanical vibration energy ...

AI Technical Summary

Problems solved by technology

Because there are low-frequency, medium-frequency and high-frequency noises in the engine room, especially when the propulsion main engine and the diesel generator set work at the same time, there is a strong reverberation noise, and the space in the engine room is small, so noise control is very difficult. At present, noise reduction The device cannot adapt to the frequency of the noise and changes the processing accordingly, and it is difficult to absorb and process multi-frequency noise

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