The silence of the cellphones.
You're enjoying a rare bit of peace and quiet, perhaps dozing on a train, when someone begins a loud cellphone conversation nearby. Electromagnetic countermeasures are available to reclaim the silence, but for the most part they are illegal. In the United States, for example, only federal agent...
| 發表在: | IEEE spectrum 46, 4 (2009). |
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| 主要作者: | |
| 格式: | Article |
| 語言: | English |