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.
In the world of radio communication: AM. . . Amplitude Modulation; one method of adding information to a radio wave for transmission to another location. FM. . .Fr â¦ equency Modulation; another method of adding information to a radio wave for transmission to another location. XM. . . Eight FM Transmitters for Your iPod Device FM transmitters are devices which plug into a sound source, like your iPod or iPhone, and transmit the sound over FM airwaves to a specific frequency. 2  Adjusting a nearby radiâ¦.