Thesaurus Term/Concept: SOUND MIRROR

Identifier 123555
Class DEFENCE OF BRITAIN
Status Preferred
Index? Yes
Scope Note 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.

Broader Terms/Concepts (2)

Related Terms/Concepts (0)

Narrower Terms/Concepts (3)

Instances/Examples (0)