Research on Application Technology of Local Sound Field Virtual Control Technology in Ship Cabin Noise Reduction

In the process of controlling the environmental noise of ship cabins, low-frequency noise control is a technical difficulty. With the development of adaptive active noise reduction technology and the application of virtual sensing technology, virtual sensing technology can be applied to cabin noise reduction in the local sound field to achieve noise reduction in personnel operating positions or battle positions. This paper further studies the multi-channel virtual sensor noise reduction algorithm, and realizes the noise reduction in a larger area by designing an algorithm for multiple virtual error points. On the basis of the 8-input 4-output noise reduction model, 8 virtual channels are constructed, and the typical 20-800Hz environmental broadband noise is controlled. The test results show that noise reduction can be achieved at all 8 virtual points, and the noise reduction the volume reaches 7.9-10.3dB; in the simulated ship cabin, the space noise can also be reduced within the same range of 40cm
^x
40cm
^x
40cm.