Easily add built in ear buds to your bike helmet is just a few minutes.  Velcro your mp3 player to the back and be wire free!
These would make hearing what's around you difficult and would be illegal in New York.
That's really cool! Safe and happy biking!
As a cheep alternative to the spring steel from the headphones you could use windshield wiper inserts as they are strong and free anyting somebody changes their windshield wipers<br>

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