If you do not wear ear plugs here is a link you should check out. If you do a search I'm sure there are many good sites that would be educational.
http://www.zianet.com/rcmedic/know.asp
I wear ear plugs just riding to work, about a 15 min. ride. It is so important to wear hearing protection while doing a lot of things for more than 20 min. at a time(mowing lawn, running a chain saw, vacuuming). I love listening to music and watching movies with the great sound that is produced. Without good hearing I would not be able to hear the delicate sounds in music or movies. Everyone hears the guitar and drums, the machine guns and explosions. I want to hear it all.
I use the yellow foam plugs, not because they're cheap but because they work for me and have a great noise reduction rating. I'm 54 years young and still have good hearing. The only time I notice a little hearing loss is when my wife speaks to me, go figure.