On the dynamics of ocean ambient noise: Two decades later

Shashidhar Siddagangaiah; Yaan Li; Xijing Guo; Kunde Yang

doi:10.1063/1.4932561

On the dynamics of ocean ambient noise: Two decades later

Chaos. 2015 Oct;25(10):103117. doi: 10.1063/1.4932561.

Authors

Shashidhar Siddagangaiah¹, Yaan Li¹, Xijing Guo¹, Kunde Yang¹

Affiliation

¹ School of Marine Science and Technology, Northwestern Polytechnical University, Xian 710072, China.

PMID: 26520083
DOI: 10.1063/1.4932561

Abstract

Two decades ago, it was shown that ambient noise exhibits low dimensional chaotic behavior. Recent new techniques in nonlinear science can effectively detect the underlying dynamics in noisy time series. In this paper, the presence of low dimensional deterministic dynamics in ambient noise is investigated using diverse nonlinear techniques, including correlation dimension, Lyapunov exponent, nonlinear prediction, and entropy based methods. The consistent interpretation of different methods demonstrates that ambient noise can be best modeled as nonlinear stochastic dynamics, thus rejecting the hypothesis of low dimensional chaotic behavior. The ambient noise data utilized in this study are of duration 60 s measured at South China Sea.