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 these cases, you may want to consider trying an Assistive Listening Device or ALD. Hearing devices can be used to overcome the effects of background noise, poor room acoustics or far distance from the speaker. And for people who are hard of hearing, an assisted listening device may be used with or without a hearing aid.