I just purchased these Koss earbud plug headphones @ Bestbuy.

http://www.bestbuy.com/site/olspage....8&type=product

They are the type that completely plug the ear canal to prevent any sound leakage. Several companies make them, including Sony, and I compared the frequency response vs. price on a lot of these models and found these to be a great deal.

They sound great and only cost 19.99 compared to 29.99 for the comparable sony model. Very slight difference in frequency response, but unless your a dog you wouldnt notice.

10-20,000 hz response vs. 9-23,000 hz

The average human can hear frequencies ranging from 20-20,000 hz.

Anyway, damn good headphones. I'm sure the sony's are great too, but i'm a cheap bastard....what can i say....