higher-order attenuation [电子] 高次衰减
A relation between average alias attenuation and filter order and sampling rate is derived from calculation.
通过计算导出了平均假频衰减与滤波器阶次及采样率的关系式。
A kind of inverse sampling filter is designed in order to compensate this attenuation and some methods is proposed to save the design resource.
文中设计了补偿此衰减的数字滤波器，并提出一种节省资源的高效实现方法。
The ground reflection and attenuation must be properly accounted for in order to use the source spectrum measured at the site of the observer to predict the actual source spectrum in the free field.
为利用观察点处实测声频谱来预估实际声源自由场频谱特性，必须适当地计及地面反射和衰减效应的影响。
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