Modelling and simulation research of radiated noise of underwater vehicle and its propagation characteristic under ice
The simulation of radiated noise from underwater vehicles and the signal propagation characteristics in un-derwater acoustic channels are two hot topics in the field of underwater acoustics.Simulate the radiated noise power spec-trum of underwater vehicles through empirical formulas and the design of FIR filters.On this basis,combined with the Bell-hop acoustic toolbox,simulate radiated noise signals transmitted through ocean channels.A study was conducted on the ocean channel under the ice water interface using the Burke-Twersky(B-T)ice water model.The results show that the power spectrum amplitude undergoes varying degrees of attenuation based on horizontal propagation distance and sound source depth.Moreover,the presence of boundaries on ice water causes additional reflection and loss of sound lines,resulting in an additional attenuation of the power spectrum at the receiving point of 20～30 dB.
acoustic propagation in under-ice channelBellhopunderwater acoustic channelreflection coefficient
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