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.
DME stands for Distance Measuring Equipment, and is a radio component in the panel of an aircraft. The device measures exactly how far you are from a VOR-DME or VORTAC (VHF Omnidirectional Range or VOR + TACAN, which is the military version of a VOR). VOR/DME - Wikipedia.