Title: Propagation of quasi-periodic random sound pulse sequence signals in shallow-water waveguides

Author(s): SUN Junping; LIN Jianheng; YANG Jun; JIANG Guojian; YI Xuejuan; JIANG Pengfei

Affiliation(s): Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences; et al.

Abstract: It is an efficient method to model ship radiated noise as quasi-periodic random sound pulse sequences. Based on the model, this paper discusses the characteristics change of ship noise after through shallow-water waveguides. Theoretical analysis and numerical simulation show that random waveguides and multi-path effects can bring much additional transmission loss for the noise line spectra, demonstrating the instability of ship radiated noise line spectra to a certain extent, and providing some theoretical support for advanced studies of ship radiated noise.