Yeah, I'm a little concerned about wind noise, mostly to preserve what hearing I have left. It's still pretty good in my right ear but I've lost a lot in the left.

Helmets can create wind turbulence noise and vary a lot between designs. Subjectively, while my POC Omne Air Spin is cooler and better vented than my Bell Formula MIPS, the POC seems to produce less wind turbulence noise. The vent designs are very different.

I occasionally mount video cameras on my helmets and can hear significant differences in wind turbulence. The camera mics can screen out most wind noise from itself, but it picks up whatever turbulence is created by where it's mounted -- stem, seat post, helmet, etc.

I added a set of AirStreamz Cat-Ear Classics, their thickest, to the straps on one helmet. Helps a little but not as much as I'd expected. I wouldn't bother with their smaller, less obtrusive versions.

I got more wind reduction with a $5 set of ear warmers from Walgreen's -- it's just a thick layer of breathable wicking fabric similar to the stuff my Bontrager RXL Thermal gloves are made of, in a springy headset that's comfortable and lightweight. But I don't wear 'em year-round. Probably the same material used by AirStreamz Polartec ear warmer doodads that fasten to the helmet straps.

I've also noticed slight differences in wind turbulence noise depending on the doodads attached to the helmet. I removed the video camera plastic mount from my POC Omne Air Spin before my ride Sunday and it seemed quieter, despite a very windy day (20 mph steady with gusts to 35). I was still wearing front and rear helmet mounted blinkies, although I didn't use them since I was riding in daylight. Next daylight ride I'll omit all the helmet doodads and try again.

I also have an aero helmet with minimal vents and a snap-on cover that blocks even those tiny vents. And it includes a magnet-attached tinted visor, to replace sunglasses. Subjectively, it seems quieter. I don't wear it often. Might try again soon while the weather is cool. It's a rounded shape, not one of the time trial/tri-bike aero helmets with elongated tails, so it doesn't look out of place on a regular road bike ride. Giro and others make this style for folks who don't want a full-on competition style aero helmet. I mostly got it for tackling Strava PRs and it does seem to help a bit, along with aero fit jerseys, etc. But the harness and strap aren't quite as comfortable as my POC and Bell so I don't wear it often.

There are also all kinds of noise-cancelling headphones, ear buds, etc., all claiming to reduce ambient noise while allowing other sounds to pass. They were originally designed for reducing impulse/impact noises for shooting ranges and similarly noisy environments where wearers still needed to be able to hear range commands, etc. Not sure if they're suitable for bicycling.

Theoretically, we could wear earphones or ear buds that exclude most sound the ear would normally pick up, and replace them with a microphone strategically placed where it would be out of the wind. For example, behind the wearer -- clipped to a jersey pocket, seat post, etc. That might work for folks with tinnitus or hearing impairments who want to hear approaching vehicles. I do know from running a rear-facing camera (Drift Ghost-X) that it picks up very little wind noise from the seat post mount. So it's plausible that a wireless mic there transmitting to ear buds could be useful.