| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
|
|
|
|
Applications of Waveguide Invariant Theory to the Analysis of Interference Phenomena in Deep Water |
| LI Qian-Qian1,2,3**, LI Zheng-Lin1,2, ZHANG Ren-He1
|
1State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190
2Haikou Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Haikou 570105
3Graduate University of Chinese Academy of Sciences, Beijing 100190
|
|
| Cite this article: |
|
LI Qian-Qian, LI Zheng-Lin, ZHANG Ren-He 2011 Chin. Phys. Lett. 28 034303 |
|
|
|
|
Abstract The waveguide invariant, denoted as β, can be used to describe the slope of the intensity of a broadband acoustic signal. In deep water, the interference patterns of the areas with dominant waterborne modes and only with bottom bounce modes are greatly different. This phenomenon is illustrated by simulation and explained by the distribution of β. The theory shows that in the convergence zone, β approaches infinity, which leads to the larger slope of sound intensity; on the contrary, in the shadow zone, β is close to 1, leading to smaller slopes.
|
| Keywords:
43.30.Bp
43.30.Re
|
|
|
Received: 04 November 2010
Published: 28 February 2011
|
|
| PACS: |
43.30.Bp
|
(Normal mode propagation of sound in water)
|
| |
43.30.Re
|
(Signal coherence or fluctuation due to sound propagation/scattering in the ocean)
|
|
|
|
|
|
[1] Chuprov S D 1982 Ocean Acoustics: the State of the Art ed Brekhovskikh L M and Andreeva I B (Moscow: Nauka) p 71
[2] Brekhovskikh L M and Lysanov Yu P 1991 Fundamentals of Ocean Acoustics (New York: Springer-Verlag)
[3] Rouseff D and spindle R C 2002 Ocean Acoustic Interference Phenomena and Signal Processing (San Francisco, California 1–3 May 2001) p 137
[4] Baggeroer A B 2002 Ocean Acoustic Interference Phenomena and Signal Processing (San Francisco, California 1–3 May 2001) p 151
[5] Kuz'kin V M and Petnikov V G 1998 Acoust. Phys. 40 75
[6] Abrosimov D I and Petukhov Yu V 2000 Acoust. Phys. 46 1
[7] Zhang R H 1993 J. Acoust. Soc. Am. 94 1785
[8] Yang T C 2003 J. Acoust. Soc. Am. 113 1342
[9] Zhang R H, Su X X and Li F H 2006 Chin. Phys. Lett. 23 1838
[10] Kuperman W A et al 1992 Computational Ocean Acoustics (New York: AIP) chap 5
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
