that could make a difference. i see foam plugs used on shooting shows incorrectly all the time. sometimes it looks like someone's cut them in half and set them sideways inside their outer ear just to "look ok" if the range officer checks them out. I've seen one "ex marine personality" put spent brass in his ear (open end outward) which must work like a bell to make the noise worse.Proper fitment might be an issue, I don't reach around and pull on the ear to open then canal. Will definitely try that next ride.
i'd be more apt to believe that you're experiencing bone conductance. sound travels through a solid better than air. remove the background noise by using ear plugs and you hear conducted sounds better because there's no longer a direct stimulation of the ear drum and other fiddly bits.Damage to your hearing aside. If you insert a earplug in your ear and tap on the top of your ear, the tapping sounds louder than without the earplugs. I have tried it with four different plugs, two different moldable types and two different foam types, all with similar results. I'm not saying it is louder, just saying it sounds louder.
Now, I believe the pads in my helmet are touching the tops and backs of my ears and the wind noise is being transferred through the helmet somehow. Again, I'm not saying it is safe to ride without earplugs. Maybe I will have to consider a different fitting helmet.
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