Sounds like a lot of battery replacing...I'm wondering the slipstreamz can just block the noise without playing any music-white noise.

No batteries in them, the only batteries would be in a MP3 player. They are covers that hold the ear buds from a player. They seem to do fair job at blocking some of the wind noise, not as well as foam rubber ear plugs do, but o.k. performance. I did have one start to vibrate and buzz but that was only on a large decent where I was hitting 35+mph.

--A

Interesting discussion. I have been wondering about this, as it is commonly believed among motorcyclists that the act of riding a motorcycle, even with a full coverage helmet, eventually causes hearing loss due to the constant wind noise. When I rode my duc daily I started wearing earplugs, and found that my concentration levels improved; suggesting to me that my brain was tiring itself somewhat dulling all that wind noise. (or maybe it was the sweet sound of the intake honk and open airbox, but I digress...)

On days where I car/bike commute I have occasionally forgotten my helmet. I notice that wearing a helmet (at least, MY helmets a Bell and a Trek) increases apparent wind noise. I do believe there is enough constant wind noise to put me close to postential damage as I ride nearing 2 hours a day.

I just haven't tried HearO's yet, but I will. I'll post again after a few trial runs.