A call to invention: DIY speaker edition – William Gurstelle

查看完整課程: http://ed.ted.com/lessons/a-call-to-invention-diy-speaker-edition-william-gurstelle

There’s a pleasure in making things for yourself — especially something unexpected. At TEDYouth 2012, William Gurstelle shows how to make your own speakers from objects probably already laying around your house, like copper wire and an empty yogurt cup.

Talk by William Gurstelle.