Abstract
In the paper examples of an oceanic waveguide with parameters varying in the horizontal plane are considered: an area of coastal wedge, (slopes and canyons), an area of varying water layer properties - in the presence of nonlinear internal waves and a temperature front. In these cases there is significant horizontal refraction or redistribution of the sound field in the horizontal plane. Due to waveguide dispersion (dependence of modal propagation constants on frequency) the refraction index in the horizontal plane depends on frequency also, and it is possible to observe different spatial and temporal variations of the sound signal similar to those in a two dimensional medium with frequency and spatial dispersion. This can be manifested as a non-stationary interference pattern, arrival time variations, and/or variations of spectra. These effects can be used to solve different inverse problems especially by using horizontal and vertical line arrays.
| Original language | English |
|---|---|
| Pages (from-to) | 98-106 |
| Number of pages | 9 |
| Journal | Acoustics Australia |
| Volume | 41 |
| Issue number | 1 |
| State | Published - 2013 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics