SOUND MIRROR

UF Sound Dish
SN An early warning structure built during and after WWI along the south and east coasts of England. Sound detecting acoustic dishes and walls could detect the sound of approaching enemy aircraft at a distance of 8 to 15 miles.
CL MILITARY DEFENCE AND FORTIFICATION
BT PASSIVE AIR DEFENCE SITE
NT SOUND MIRROR (20 FEET)
SOUND MIRROR (200 FEET)
SOUND MIRROR (30 FEET)

 
 

SOUND MIRROR

UF Sound Dish
SN An early warning structure built during and after WWI along the south and east coasts of England. Sound detecting acoustic dishes and walls could detect the sound of approaching enemy aircraft at a distance of 8 to 15 miles.
CL MILITARY DEFENCE AND FORTIFICATION
BT EARLY WARNING SITE
NT SOUND MIRROR (20 FEET)
SOUND MIRROR (200 FEET)
SOUND MIRROR (30 FEET)