新泽西海岸浅水区的中频声波传播。II. 强度波动

Mid-frequency acoustic propagation in shallow water on the New Jersey shelf. II. Intensity fluctuation.

作者信息

Tang Dajun, Henyey Frank S, Wang Zhongkang, Williams Kevin L, Rouseff Daniel, Dahl Peter H, Quijano Jorge, Choi Jee Woong

出版信息

J Acoust Soc Am. 2008 Sep;124(3):EL91-6. doi: 10.1121/1.2968295.

DOI:10.1121/1.2968295

Abstract

The scintillation index and the intensity cumulative distribution function of mid-frequency (2-10 kHz) sound propagation are presented at ranges of 1-9 km in a shallow water channel. The fluctuations are due to water column sound speed variability. It is found that intensity is only correlated over a narrow frequency band (50-200 Hz) and the bandwidth is independent of center frequency and range. Furthermore, the intensity probability distribution peaks at zero for all frequencies, and follows an exponential distribution at small values.

摘要

给出了浅海声道中1-9千米范围内中频（2-10千赫）声传播的闪烁指数和强度累积分布函数。这些波动是由水柱声速变化引起的。研究发现，强度仅在一个窄频带（50-200赫兹）内相关，且带宽与中心频率和距离无关。此外，所有频率下强度概率分布在零处达到峰值，且在小值时遵循指数分布。

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