Has anyone measured the interior noise level of a Cozy Mk IV during takeoff, at cruise, etc? I'm curious to know how these readings compare to those taken in roughly equivalent models of production aircraft. As an example, one source lists a reading of 92-94dbs at approximately 400Hz at the pilot's ear in a Cessna 172 in cruise configuration. Have any of you Cozy builders felt the need to take substantial measures to address interior noise level?