Active noise reduction device for noise of cabin

Abstract

The invention belongs to the technical field of ship cabin noise treatment, and discloses an active noise reduction device for cabin noise. The active noise reduction device comprises an acquisition device, a control unit and an active noise reduction unit. The acquisition device is used for acquiring noise signals and position image information and transmitting the noise signals and the position image information to the control device. The control unit comprises a noise data post-processing module and a noise active control module; the noise data post-processing module processes the collected noise signals, judges whether the noise exceeds a threshold value or not, and obtains the position of a noise source in combination with the position image information; the noise active control module is used for analyzing sound information at a sound source position in real time, sending a control instruction and transmitting the control instruction to the active noise reduction unit; and the active noise reduction unit receives an instruction of the noise active control module and performs active noise reduction on the sound at the sound source position. According to the invention, the position of the noise source can be accurately positioned and identified, the noise problem is solved from the sound source, and the purpose of stable, rapid and large-scale noise reduction is achieved.

Description

technical field [0001] The invention belongs to the technical field of noise control in ship cabins, and in particular relates to an active noise reduction device for noise in ship cabins. Background technique [0002] The noise environment in the cabin of a ship always affects the life, work quality and physical health of the crew. According to the principle of sound transmission, the main source of noise is sound leakage from structural gaps, such as door cracks, window cracks, etc. In addition, structural sound radiation etc. [0003] At present, the noise reduction measures for ship cabins are usually passive noise reduction measures such as cabin roof sound absorption measures, bulkhead sound insulation measures, and floor sound insulation and vibration reduction measures. High, and the requirements for technology standards are high. [0004] The Chinese patent document with the notification number CN109360548A discloses an active noise reduction system for ship cabin...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an active noise reduction device for the cabin cabin noise in view of the defects in the prior art, which can accurately locate and identify the position of the noise source, solve the noise problem from the sound source, and realize stable, fast and Purpose of scope noise reduction

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