Research and experimental verification on low-frequency long-range sound propagation characteristics under ice-covered and range-dependent marine environment in the Arctic ...

• Main Authors: Weng, Jinbao, Qi, Yubo, Yang, Yanming, Wen, Hongtao, Zhou, Hongtao, Xue, Ruichao
• Format: Report
• Language: unknown
• Published: arXiv 2023
• Subjects: Sound cs.SD; Numerical Analysis math.NA; Atmospheric and Oceanic Physics physics.ao-ph; Applied Physics physics.app-ph; FOS Computer and information sciences; FOS Mathematics; FOS Physical sciences; Arctic; Sea ice
• Online Access: https://dx.doi.org/10.48550/arxiv.2311.07175; https://arxiv.org/abs/2311.07175

At present, research on sound propagation under the Arctic ice mainly focuses on modeling and experimental verification of sound propagation under sea ice cover and unique sound velocity profiles. Among them, the main research object of concern is sound transmission loss, and this article will delve into the time-domain waveform and fine dispersion structure of low-frequency broadband acoustic signals. Firstly, based on the theory of normal modes, this article derives the horizontal wavenumber expression and warping transformation operator for refractive normal modes in the Arctic deep-sea environment. Subsequently, based on measured ocean environmental parameters and sound field simulation calculations, this article studied the general laws of low-frequency long-range sound propagation signals in the Arctic deep-sea environment, and elucidated the impact mechanism of environmental factors such as seabed terrain changes, horizontal changes in sound velocity profiles (SSPs), and sea ice cover on low-frequency ... : 46 pages, 35 figures ...