1 a wasting away of the body, as from poor nutrition, nerve damage, or disuse. 2  to undergo atrophy; wither; degenerate:His crippled leg began to atrophy with no exercise. 3  to become weakened; decline:Industry atrophied in bad economic times.
Voice Amplifiers / Long Range Listening Devices. Listening devices can be utilized for a variety of purposes including listening through a wall, listening from a distance or enjoying your favorite animals in the wild. More complex systems contain an audio transmitter and receiver.
(CTCSS/DCS). In some FRS/GMRS Two-Way-Radio there are 38 CTCSS codes and 83 DCS codes, which means Continuous Tone Coded Squelch System and Digital Coded Squelch. The purpose of these codes is to reduce or eliminate the interference between other users that are talking. GMRS radio has a range of up to 5 miles or more. The range is relative to the obstacles around you. On an open field, or water the range is greater. Urban development may reduce the range to 2 miles or less. If you are in a tall building the range is about 20 floors. This is very common with two-way radios.