Apr 13, 2018
Concrete ears: its also known as Acoustic mirrors. It is a passive device used to reflect and focus (concentrate) sound waves. Microphones were suspended at the focal points of these dishes, like today's D2H dish antennas. Parabolic Acoustic mirror are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events. #acousticmirrors #concreteears #sound #worldwar2 #parabolicmicrophone #civilengineeringfacts