I have some high frequency hearing loss but can still hear pretty well overall. Surprising considering all the exposure to firearms and munitions training in service years ago, and way too much loud music.
I tried some Cat-Ears too, the largest fluffiest ones. They cut down the wind noise a little, but it's pretty subtle. I had to pull the Cat-Ear away from my ear while riding to realize it really was cutting down some of the wind noise. A full ear cover would be much more effective -- I wear those in winter and it really cuts down the wind noise while I can still hear traffic and ambient sounds.
Ear plugs give me ear aches and headaches if I wear them too long, even soft cotton balls. For shooting and industrial environments (I was a safety inspector before retiring) I had to wear ear muffs.