frequencies with an
array of metal tubes.
By Charles Platt
Block audible frequencies
with this series of tubes.
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 mysteri- group, a phononic band-gap filter could be just the
ous physical properties, is the subject of numerous thing. Best of all, you can build one for well under
academic papers, and could provide a unique “wow” $100 using wood, electrical conduit, and maybe a
factor to boost your status in your power-nerd peer few cable ties.
Photography by Charles Platt
78 Make: Volume 15