本文讨论比较一般的指向性辐射器在分层介质中的声场，并将指向性概念应用于简正波计算。
In this paper, the sound field of a more general directional radiator in a stratified medium is treated, and the concept of directivity is applied to calculation of the normal modes.
本文讨论比较一般的指向性辐射器在分层介质中的声场，并将指向性概念应用于简正波计算。
In this paper, the sound field of a more general directional radiator in a stratified medium is treated, and the concept of directivity is applied to calculation of the normal modes.
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