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。

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The bus stopped at Eel Brook Common and the players led the singing on a radio microphone. When owner Abramovich gave a special wave the crowd erupted.

大巴在艾尔布鲁克公共绿地停下，队员们对着无线话筒领唱起歌来。当老板阿布拉莫维奇特意向球迷挥手时大家沸腾了。

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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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Microsoft, for example, has been developing software that takes advantage of the different times an acoustic wave arrives at each microphone in an array around the screen of a computer.

ECONOMIST: Noise-cancelling technology