The Audio Echo Filter repeats a sound after a given Delay, attenuating the repetitions based on the Decay Ratio.
音频回声滤波器在一个给定延迟重复一个声音，衰减基于衰变率的重复。
But to the CW pulse signal with changing carrier wave frequency, common filter cannot achieve narrowband filter, whereas broadband filter cannot reach the request of the signal-noise ratio.
可是，对于载波频率不断变化的CW脉冲信号，普通的滤波器难以实现窄带跟踪滤波，而宽带滤波又不能达到提高信噪比的要求。
The paper discusses the relation of the bubble pressure and the filtering ratio of filtering medium (filter).
本文论述了冒泡压力和过滤介质（芯）过滤比这两个不同定义概念的关系。
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