Using my helmet in a R22 or R44 is kind of a problem, as the low RRPM warning horn gets so muffled by the sound isolation of the helmet, that it's hardly noticeable. Therefore I prefer not to use a helmet on these aircrafts as I worry I won't hear the horn in a low RRPM situation. Is there any solution to it?
I never had that problem, flown with gentex and MSA Gallet helmets