Mid-frequency sound propagation through internal waves at short range with synoptic oceanographic observations

Daniel Rouseff, Dajun Tang, Kevin L. Williams, Zhongkang Wang, James N. Moum
2008 Journal of the Acoustical Society of America  
Introduction Both linear and non-linear internal waves are potentially important at the SW06 site. On August 18, mid-frequency acoustic transmission data were collected on a vertical array over a continuous 7-hour period at range 550 m. The combination of acoustic frequency and range selected for this part of The combination of acoustic frequency and range selected for this part of the experiment were deemed relevant to studying the effects of both types of internal waves. Introduction Linear
more » ... ternal waves often are modeled as a background random process introducing random fluctuations in the acoustic field. Introduction Linear internal waves often are modeled as a background random process introducing random fluctuations in the acoustic field. • At lower mid-frequencies (~1 kHz) and range 550 m, acoustic propagation should be described by classical weak-scattering theories (e.g., Born, Rytov). • At higher mid-frequencies (~10 kHz) and range 550 m, acoustic propagation should be described by strong-scattering theories (e.g., 2nd and 4th moment theories).
doi:10.1121/1.2963097 pmid:19045565 fatcat:iontoyvk7zgmxbknn5hb3rok4a