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.
It is reported that by using the VLBA that accurate distance measurements can be made to NGC4258 (reported to be 23.5 million light years away). Coordinating these ten radio stations to work together as the worlds largest dedicated, full-time astronomical instrument is impressive.