A research project recently conducted at PCO showed that users of headsets are less likely to over expose themselvs to excessive sound levels if they selected insert phones with noise excluding ear cuffs. The study was supported by the company recognized as the leader in high tech insert phone manufacture (Etymotic Research), but the researchers at PCO (Pensylvania College of Optometry/Audiology) are highly regarded. The research project design was set-up to use a probe tube microphone at the ear drum in the ear canal to monitor sound levels of subjects adjusting music samples to their liking in various environments. Users of insert phones fitted with sound excluding cuffs (ear plugs) selected less acoustic amplitude in the music. Our use of headphones on motorcyles involves unusually high background noise levels and the finding os this research project probably hold high significance for our purpose. The wind baffle noise we tend to overcome with sound volume on our audio systems leaves us at risk for noise induced hearing loss, especially if your hearing has already been diminished by noise or other sensory type hearing loss already --- the more you get, the quicker you get more.