Check you squelch setting on your audio panel. The static you hear when airborne may be air noise being picked up by your mike. Turn up your squelch setting a little and see if it goes away. I made this mistake a few times myself but finally figured it out. ANR headsets allow you to hear stuff you've probably haven't noticed before due to the general noise level.
RV7A - N523RM, IO-360, C/S, Aerotronics Panel
Retired KC-135A/E/R Driver - Desert Storm Vet (USAF)
Vietnam Vet (US Army)
2017 Contribution: 12/17/2016