Aircraft Detection Before Radar — Acoustic "Ears"
Here are some historic images that are quite amazing and unique. Prior to the invention of radar, there were a lot of contraptions built to listen for approaching aircraft.
How air attacks were detected before radar… Old time acoustic hearing aids
Here are some historic images that are quite amazing and unique. Prior to the invention of radar, there were a lot of contraptions built to listen for approaching aircraft.
How air attacks were detected before radar… Old time acoustic hearing aids
