Hope this can help some out there. I have clarity aloft headsets flying an S1 with plexi floor panels and a 4 into 1 exhaust. Needless to say the plane is "CRAZY" loud at full RPM. It was extremely difficult to hear tower etc. After hunting and messing with adjustments ie. gain, sidetone, and squelch to no avail, I tried the simple solution. Electrical tape on the forward side of the mike. Athletic tape (2 layers) on the mouth side of the mike with the Oregon sock and leather cover. Results.....Absolutely Fantastic.