The output of Amplifier has a filter, which can inhibit the out-off-band harmonic waves and unwanted emission component.
放大器的输出接有滤波器，可有效抑制带外谐波和无用发射分量。
In median plane, heads auricle, body can filter the sounds from different elevations and result in the different characteristics of spectra in sound waves.
在中矢面上，人的耳廓、头和躯干对来自不同高度角的声音产生了不同的滤波作用，使进入人耳的声波产生了依存声源高度角的谱特征。
Studies emphatically the influence of waves on the movement of sway, roll and yaw in accordance with a particular shipping model and offers the method to design shaping filter.
针对一个特定的船舶模型，着重研究了海浪对其横荡、横摇和艏摇运动的影响，给出了成形滤波器的设计方法。
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