Go Pro noise problem

I have a GoPro helmet cam and I really like it a lot but I have a problem with it and thought perhaps someone here may be able to enlighten me a bit. I have only used the camera on my VFR800 and I attach it out front on the nose of the bike. The biggest problem is noise, not wind noise but when I hit a bump it makes a noise I really do not know how to describe except maybe it sounds like this----brruuuppp--. and living in Pa. we have plenty of bumpy roads, so the brruuuuuppp noise is a regular on my movies. So if there are any movie pros with good ideas pleas let me know how to fix this. thank you wilburj