Host Mo Rocca shows us tunnels of sound with directional speakers; how silver thread has put an end to smelly clothes; the first modern copying machine; and an innovative manual clothes washer.
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Innovation Nation - 4x14 Sound Tunnels
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Feb 17, 2018
- Episode 4x14
- Show special No
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