I have a Kitfox IV Classic project that I’m finishing and I have noise in the headsets when I call out. Engine is a Rotax 582 gray head, comm is a VAL com 760 tsp, intercom is a PS engineering PM1000. The comm and the intercom were part of the box of parts that came with the plane and are not new. I purchased a pair of Bose 35 II headsets and a pair of NFlightMics on a recommendation from a friend. When the engine isn’t running, the headsets with the mics work great. With the engine running I have a large amount of noise when calling out. Any suggestions on cutting out the engine noise when transmitting?