  Core of SoundBug speaker.
This is the heart (not easy to get to!) of a SoundBug brand magnetostrictive alloy speaker. The rod you see sticking out of the copper coil is made of Terfenol alloy, which changes its length when exposed to a magnetic field.
Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 17 April, 2009
Text Updated: 17 April, 2009
Price: Donated
Size: 0.5"
Purity: <50%
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