Acoustic Wave Scattering from a Progressive Internal Wavefield,
Abstract
The scattering of sound from an internal wave field is considered. The acoustic index of refraction depends on the density of sea water. Hence, spatial and temporal density variations arising from the presence of internal waves will produce a perturbation in the index of refraction. Therefore, an acoustic wave transmitted through a stratitied fluid in which internal waves are present, will be modulated by the internal wave field and scattering and refraction will occur. It is shown that the frequency spectrum of the scattered acoustic field is comprised of the fundamental acoustic frequency and two side frequencies. Equations describing the phenomenon are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 22, 1970
- Accession Number
- ADA071329
Entities
People
- P. A. Barakos