A set of coupled wave equations for multiple dimensional acoustooptic diffraction with multiple acoustic waves along different directions is put forward and its solutions are derived.
本文建立了沿不同方向的多个超声波信号作用下的多维声光衍射的耦合波方程，并求出相应的解。
This paper analysis the acoustic principles of noise barriers, discuss the transmission, reflection and diffraction of the noise barrier, and the influencing factors of the three transmission routes.
本文从分析声屏障的声学原理入手，探讨声屏障的透射、反射和绕射机理以及对这三种传播途径的影响因素。
The NLOS sound signal usually arrives at acoustic array by diffraction, and the diffracted transmission path is a geodesic according to the extensive Famat's principle.
非视距声信号通常经过绕射到达基阵，根据广义费马原理，传播路径为一条短程线。
And then based on the theory of the interaction of acoustic wave and optic wave, the Raman-Nath and Bragg diffraction are introduced in detail, of which theoretical model is given.
紧接着从声光调制的原理入手，详细的介绍了拉曼·纳斯衍射和布拉格衍射这两种基本的声光作用并给出其理论模型。
And then based on the theory of the interaction of acoustic wave and optic wave, the Raman-Nath and Bragg diffraction are introduced in detail, of which theoretical model is given.
紧接着从声光调制的原理入手，详细的介绍了拉曼·纳斯衍射和布拉格衍射这两种基本的声光作用并给出其理论模型。
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