Time to make: one minute.
As seen in my article in Make Magazine volume 5
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. People sometimes ask "isn't it dangerous not being able to hear?" No. Talking on a cellphone shuts off most of the brain whereas listening to headphones is no more dangerous than say, being deaf.
Lots of my friends use these units and no harm has come to anyone.
Now on Know How! Click on the steps above for more details.
When you're done with this episode, check out episodes two, three, four, five, six, and
Step 1: The Three Ingredients
These are Peltor model H10A, my favorite.
2) Airline or walkman headphones of the one-wire-per-ear variety.
3) A cutting tool.