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Surprisingly, this isn't really true (as far as noise is concerned). Noise pollution travels far, and if you're using sensitive equipment, you can easily pick u
by jtaillon 7y ago
Surprisingly, this isn't really true (as far as noise is concerned). Noise pollution travels far, and if you're using sensitive equipment, you can easily pick up the noise of planes flying nearby at 30,000 ft.
- paulmd 7y agoThis is in fact how airplanes were detected before radar was invented. Not a joke. https://rarehistoricalphotos.com/aircraft-detection-radar-1917-1940/ https://rarehistoricalphotos.com/aircraft-detection-radar-19... https://en.wikipedia.org/wiki/Acoustic_location https://en.wikipedia.org/wiki/Acoustic_location
- DonHopkins 7y agoNow you've made me want to dress up as an Airplane Detector for Halloween!