Attention Deficit Disorder Prosthetic Memory Program

Acoustic Mirrors

ADDPMP044

An acoustic mirror is a passive device used to reflect and focus (concentrate) sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events. Between the World Wars, before the invention of radar, parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by listening for the sound of their engines.

Acoustic Mirrors - © Attention Deficit Disorder Prosthetic Memory Program
Acoustic Mirrors - © Attention Deficit Disorder Prosthetic Memory Program
Acoustic Mirrors - © Attention Deficit Disorder Prosthetic Memory Program
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