Britain built an experimental wall to mirror sound from enemy aircraft up to 27 miles out to sea. Does it still work today? Tom Scott tests it out, using a drone.
Video: The 90 year sound mirrors that protected Britain during the war
yout wall
yout wall
Britain built an experimental wall to mirror sound from enemy aircraft up to 27 miles out to sea. Does it still work today? Tom Scott tests it out, using a drone.