I fixed my noisy Shoei...by purchasing an Arai!
Same for myself.. Though it ended up being the AGV that was the best fit in the end. Aria used to be my lid, when I had hair..Helmet fit is usually the biggest factor in things like this, though. I've found that, for me, a Shoei that fits my head front to back properly is too wide in the cheek/ear area....leaving lots of room for noise to build. Arai (the Signet Q series) is much narrower side-to-side, and is therefore much quieter for me. Proper fit is a very subtle thing....and one that it took me many years to finally get a handle on...which is why, for a while, I sold more Arai helmets than anyone in the Southeast.
any thoughts on the RX-Q ? I have a Vector now and it's pretty nice.Arai will flat out tell you that the Corsair series will be noisier than any of their other helmets. The overriding consideration on a balls-out racing helmet like the Corsair is airflow. Noise fatigue is not an issue, even in a 25 lap race. Doing a 400 mile day, on the other hand....wind noise can be a surprising factor in fatigue!