Holographic reconstruction research on the radiated acoustic field of the underwater vehicle

Holographic reconstruction of underwater vehicle radiated noise sources is one important means to improve the sound stealth performance and comprehensive ability of underwater vehicles. For the noise spectrum model, the linear spectrum of radiated noise from an underwater vehicle is extracted using a joint algorithm combining the Welch power spectrum estimation and median filter, and some dominant frequencies are determined. Then, according to the acoustic field reconstruction model of near-field acoustic holography, experimental research on the radiated noise field reconstruction of the TH-B050 portable underwater vehicle is completed. The experimental results show that this method can obtain the spatial distribution image of the noise source reconstructed at different dominant frequencies. The noise source of the underwater vehicle is visualized, which provides a basis for subsequent noise reduction measures..