Figure 5-2 -- ETVS TED.
Microphones
A microphone converts sound energy into corresponding electrical energy. When you
speak into a microphone, the audio pressure waves from your voice strike the
diaphragm of the microphone and cause the diaphragm to move in and out. The
diaphragm is attached to a device that causes current to flow in proportion to the
pressure applied to the diaphragm.
NOTE
Wireless headsets are not authorized for use in an
ATC environment.
Types and Techniques
There are two types of microphones in use today by ATC facilities: the hand-held type
and the headset type. The headset type is considered the easiest and best to use. Most
hand-held microphones are relatively inefficient, and the slightest variation of
5-7
