Before Radar, they used these giant concrete "Sound Mirrors" to detect incoming enemy aircraft
Before the invention of radar technology in World War II, enemy aircraft were spotted using sound locators that looked like musical instruments. 1927. Source: Gallica BnF : r/MilitaryHistory
CameraLab on Twitter: "Long before the invention of radar, german officers wearing portable sound locating apparatus to detect enemy aircraft on Western Front of WWI, 1917 https://t.co/pVcGlrt64b" / Twitter
Inventors and Inventions - - Before Radar (Page - 2) - Who invented radar - earlier images and links to sites of interest - describing early acoustic devices - sound mirrors, acoustic
The invention of radar—A lesson for pandemic preparation
The 'war tubas' we used to spot warplanes before radar - CNN Style
Radar and Sonar
Ron Piovesan on Twitter: "@PikeGrey1418 @wherrypilgrim Excellent history of these devices and how WW1 accelerated innovation in military listening technology is found in Stereophonica by @gasciaouzounian - https://t.co/i0gI2rbSxv" / Twitter
Chain Home - Wikipedia
Radar-General Scenes - Science (See Also: Australia Army: Navy R.A.F. & General Merchant Shipping & Aviation Science). September 10, 1945. (Photo by Photographic News Agencies Ltd Stock Photo - Alamy
Aircraft detection before radar, 1917-1940 - Rare Historical Photos
How was sound used before radar to warn of enemy aircraft approaching Britain? - Quora
The 'war tubas' we used to spot warplanes before radar - CNN Style
RADAR - The Battle Winner? | History of the Battle of Britain | Exhibitions & Displays | Research | RAF Museum
Radar and Sonar
Signal Corps in World War II | Article | The United States Army
Acoustic locator - Detecting enemy aircraft before the invention of Radar
Acoustic Radar. Horn and Wooden Wine Rack Construction.
Aircraft Detection Before Radar - Aviation Humor
Aircraft Detection Before Radar | Radar, Forest sounds, Creative writing ideas
The 'war tubas' we used to spot warplanes before radar - CNN Style
World War II Technology that Changed Warfare - Radar and Bombsights
How Armies Detected Enemies' Warplanes Before The Radar: War Tubas - MobyGeek.com
Aircraft detection before radar, 1917-1940 - Rare Historical Photos
