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Functional trinket reacts to sound pressure

Functional trinket reacts to sound pressure
Strictly speaking, a trinket cannot be functional, but the title of this article is apt. It is a kind of miniature VU meter whose LED bar fluctuates in rhythm with ambient sound. Owing to its modest dimensions, it can easily be worn as an adornment which, in a disco or at a party, will, no doubt, draw the attention of many.
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