Sound Mirrors
Although an instrument of war, the Sound Mirrors' harnessing of sound is an interesting phenomenon. …The mirror was shaped to form part of a sphere and a sound collector was mounted on a pivot at the focal point. The collector was usually a trumpet shaped cone connected to the ears of the listener with rubber tubes … He rotated the sound collector horizontally with a hand wheel and vertically by way of foot pedals…
Early warning sound mirrors
The Hythe sound mirror system
Related: Clock DVA Sound Mirror 12"
