The Custom Rolloff can be modified by modifying the volume distance curve as described below.
自定义衰减可以修改通过修改音量的距离曲线，如下所述。
In order to achieve flatter tops and sharper rolloff in the passband, the multiple-ring higher order structure is employed.
为实现通带内频率响应平坦度高、滚降时间快的滤波效果，采用多环结构形成的高阶滤波器。
If a power meter and power sensor has a 1-mhz video bandwidth, it will act as a typical low pass filter with a 3-db rolloff point at 1 MHz.
如果功率计和功率传感器拥有1 M Hz的视频带宽，他将扮演一个- 3db截止点为1mhz的典型低通滤波器。
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