But the microphone and chip in the device sample the incoming sound and produce an inverted wave that cancels out just the sound of the drill.
但是装置里的麦克风和芯片从传入的声音中采样，并且产生抵消牙钻声的反向波。
Two spall planes were observed in the soft recovered sample for the high stress triangular wave experiment.
在经过高应力三角形波实验的软回收样品上，发现了两个层裂面。
But the microphone and chip in the device sample the incoming sound and produce an inverted wave that cancels out just the sound of the drill.
不过，该设备上内置的麦克风和芯片会对传入的声音取样并制造反相波，这种反相波刚好可以抵消牙钻的声音。
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