Observation of sound focusing and defocusing due to propagating nonlinear internal waves
Abstract
Fluctuations of the low frequency sound field in the presence of an internal solitary wave packet during the Shallow Water ’06 experiment are analyzed. Acoustic, environmental, and on-board ship radar image data were collected simultaneously before, during, and after a strong internal solitary wave packet passed through the acoustic track. Preliminary analysis of the acoustic wave temporal intensity fluctuations agrees with previously observed phenomena and the existing theory of the horizontal refraction mechanism, which causes focusing and defocusing when the acoustic track is nearly parallel to the front of the internal waves [J. Acoust. Soc. Am., 122(2), pp. 747–760 (2007)].
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 28, 2008
- Source ID
- 10.1121/1.2963087
Entities
People
- A. Tskhoidze
- B. Katsnelson
- E. A. Karjadi
- James N. Moum
- Jiangyi Luo
- Justin Lynch
- Mohsen Badiey
Organizations
- Office of Naval Research
- Oregon State University
- University of Delaware
- Voronezh State University
- Woods Hole Oceanographic Institution