The proper sound propagation model is the basis of transfer function prediction of underwater acoustical channel.

合适的水声传播模型是水下声信道传递函数预报的基础。

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Sonar is a technique that USES sound propagation (usually underwater) to navigate, communicate or to detect other vessels.

声纳一种利用水下声音传播来导航，联络或侦查其他船只的技术。

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Because of the coupling between surface channel and SOFAR channel, sound propagation in two, axis underwater channel is complex and calculation of acoustic fields is difficult.

由于表面声道与深海声道间的耦合效应，声波在双轴海洋声道中的传播比较复杂，因此求解双轴海洋声道中的声场就比较困难。

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