These home-made hifi headphones work as well or better than Sony or Bose noise-cancelling headphones. Cost: $2. Time to make:one minute. Difficulty:none. Unlike the commercial products, these block outside noise instead of cancelling it.
Listen to music or books on tape without hearing traffic noise, screaming babies, etc.
I've been making these for more than a decade.
Build jackhammer headphones
Click through to watch this video on instructables.com
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www.instructables.com
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