Sumu Headphones

I have two purposes for the use of noise-canceling headphones. Sometimes I run on the aircraft and noise from the engine block. Other times, I'm at work and need to vote for a phone number so I can concentrate. Most of headphoens I've tried to do pretty good job of blocking the engine noise from planes, but they are not very well stop the vote. Direct Sound heeadphones only noise reduction headphones, which is really a great task to block both kinds of noise. As an added bonus, these headphones are not needed batteries, and get free, beautiful, white noise MP3 with your purchase.