August 2008
Intermediate to advanced
192 pages
8h 8m
English
Filter sound frequencies with an array of metal tubes.

Block audible frequencies with this series of tubes.
Photography by Charles Platt
Few people can claim to own a phononic band-gap filter — and even if they did, they might have a hard time explaining why they need one.
Still, if you like the idea of a device that has mysterious physical properties, is the subject of numerous academic papers, and could provide a unique “wow” factor to boost your status in your power-nerd peer group, a phononic band-gap filter could be just the thing. Best of all, you can build one for well under $100 using wood, electrical ...
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