Hacker News
- The 'war tubas' we used to spot warplanes before radar (2018) https://edition.cnn.com/style/article/war-sound-locators-before-radar/index.html 24 comments
- The 20th century 'war tubas' used to spot warplanes before radar http://edition.cnn.com/style/article/war-sound-locators-before-radar/index.html 4 comments worldnews
Linking pages
- Ukraine's Acoustic Drone Detection Network Eyed By U.S. As Low-Cost Air Defense Option https://www.twz.com/air/ukraines-acoustic-drone-detection-network-eyed-by-u-s-as-low-cost-air-defense-option 65 comments
- Ukraine Using Thousands Of Networked Microphones To Track Russian Drones https://www.twz.com/land/thousands-of-networked-microphones-are-tracking-drones-in-ukraine 21 comments
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