Local spectral and spatial frequency moments of shallow-water sound propagation

被引：3
|
作者：
Loughlin, PJ [1 ]
机构：
[1] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA
来源：
ADVANCED SIGNAL PROCESSING ALGORITHMS, ARCHITECTURES, AND IMPLEMENTATIONS XII | 2002年 / 4791卷
关键词：
instantaneous frequency; instantaneous bandwidth; dispersive pulse propagation; time-frequency analysis;
D O I：
10.1117/12.455784
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
Underwater sound propagation is inherently nonstationary, particularly in shallow water where the ocean surface and bottom act like waveguide boundaries, giving rise to structural (or geometric) dispersion. The spectrogram has been a principal means to study the nonstationarities and dispersion characteristics of shallow-water sound propagation. In this paper, we give the low-order conditional time-frequency moments of a wave propagating in a waveguide. Comparison of these results is made to spectrograms of explosive source sound propagation in the Yellow Sea.
引用
收藏
页码：51 / 56
页数：6
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