The patented real-time radio frequency scanner uses computer tomography and works by using the same technology as a mobile phone, but with only a tiny fraction of its power.

这项专利实时无线电频率扫描仪使用计算机X射线断层术，并靠使用与手机一样的技术工作，但是只有它能量的一小部分。

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"All right, we're gonna go forward with the burn ... like we talked about, " said a voice on a local police scanner frequency.

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The FM radio's scanner "found" a station at virtually every legal frequency, even when no signal was present--as well as several channels unusable in North America.

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The laser beam in the scanner shoots a steady stream of photons, all of the same frequency, at the plastic.

ECONOMIST: Recycling