MIT的研究，从视频中提取、分析物体受到声波产生的振动模式，从而恢复重建、听到声音。这也是一种遥感吧。

The Visual Microphone: Passive Recovery of Sound from Video

http://people.csail.mit.edu/mrub/VisualMic/

Researchers at MIT, Microsoft, and Adobe have developed an algorithm that can reconstruct an audio signal by analyzing minute vibrations of objects depicted in video.

http://newsoffice.mit.edu/2014/algorithm-recovers-speech-from-vibrations-0804