Got a weird question for you guys. Might be a little hard to explain but ill do my best. I have a Delkevic 8inch exhaust on my fj09 and as it sounds amazing it is giving me some issues with my ears. At cruising speeds and when getting on the throttle slightly the exhaust creates (best i can explain it) a droning, low tone that causes my ears to ring (from what im assuming is vibration of the inner ear)... but heres the problem, it only does this to my ears when I have ear plugs in and a helmet on. without either theres no issue besides it being too loud. but with a helmet on (ive tried 4 different helmets, currently using a AGV K6) and ive also tried 5 different types of ear plugs ranging from $1-$40. They all exhibit the issue. Again I know this sounds weird, but its not wind noise or anything else, its only when the exhaust is hitting certain rpms, most specifically cruising ranges. Im at a point where im about to put the stock exhaust back on but really dont want to resort to this. Any ideas or experience? - the main problem here is that my ears are ringing after riding short time frames with earplugs in not because its too loud, but some weird noise/vibration its making off the helmet im assuming...?