屏蔽衰减是置于声源与接受点之间的足够重的(至少20kg/m2)不透气墙或其它类似的障碍物造成的声传播衰减。其机理是声屏障反射或吸收了全部或部分直达声能量,使到达接收点的能量以绕射声为主。
屏蔽衰减(screening attenuation): 50 MHz ---2000 MHz 耦合衰减(coupling attenuation): 1 MHz ---1000 MHz
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...线注入法;屏蔽衰减;转移阻抗 [gap=1133]Key words:absorbing clamp method;line injection method;shielding attenuation;transfer impedance ...
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高传导性能和屏蔽衰减 high conductivity and shielding attenuation
浅侧向屏蔽电流衰减 SBCA
深侧向屏蔽电流的衰减 deep bucking current attenuation ; DBCA
浅侧向屏蔽电流的衰减 shallow bucking current attenuation
仔细的屏蔽通常能够衰减串模噪声,很多仪器都有内部的滤波器以进一步降低这种噪声的影响。
Careful shielding will usually attenuate normal mode noise, and many instruments have internal filtering to reduce the effects of such noise even further.
在极端的情况下,可能需要使用一种专门建造的屏蔽室,以便对令人讨厌的干扰信号进行足够的衰减。
In extreme cases, a specially constructed screen room may be necessary to attenuate the troublesome signal sufficiently.
地面衰减,屏蔽,反射,指向性指数的影响。
Influence from Ground Attenuation, Screening, Reflection, Directivity Index.
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