... directional radiation 指向性辐射 directional receiver 接收定向信号的接收机 directional reception 定向接收 ...
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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.
小指的是物理维度和其辐射的声波相比很小,或者其外形不会和该点声源指向性响应发生干扰。
"Small" means that the physical dimensions are small compared to the wavelength being radiated or that the shapes do not interfere with the polar response of the point source.
分析结果表明固定四角薄型平板的振动是不规则的,在远声场振动辐射是无指向性的。
The results indicate that the vibration of thin flat plane loudspeaker with four corners fixed is anomalistic and the vibration radiation at far sound field doesn't have any directionality.
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