Hacker News new | ask | show | jobs
by jtaillon 2267 days 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.
1 comments

This is in fact how airplanes were detected before radar was invented. Not a joke.

https://rarehistoricalphotos.com/aircraft-detection-radar-19...

https://en.wikipedia.org/wiki/Acoustic_location

Now you've made me want to dress up as an Airplane Detector for Halloween!