ABSTRACT
Two similar devices for the electronic surveillance of open areas (areas outside of structures, vehicles, etc.) are the parabolic reflector microphone (mic) or big ear and the shotgun mic (Figures 8.1 and 8.2). A parabolic mic is a mic that uses a parabolic to collect and focus sound waves onto a receiver, in much the same way that a parabolic (like those used for a satellite dish) does with radio waves. e purpose of the parabolic reector is to reect sound to a centralized point, which is where the mic element is located. A parabolic reector is used to collect and focus sound waves to a mic receiver (Figures 8.3 and 8.4).
