and ambient acoustic noise

基本解释

Underwater acoustic channel is a time-space-frequency variant channel, having a character for narrow bandwidth, high ambient noise level and strong interference of multipath.
而由此构成的水声信道是一个空间与频率响应随机快速变化的传输信道，存在窄带、高噪及强多途干扰。
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The noise sources are assumed to be statistically independent directional acoustic sources situated on the surface, and the effects of ocean environment on ambient noise are studied.
假设噪声源是统计独立分布在海面上的指向性点源，研究噪声源特性以及传播条件对海洋环境噪声场的影响。