I DIYed me some wind-noise reducers using a sock and a bit of velcro.
With my new bike, I started riding a bit faster and one thing that bothered me was all that wind noise. So I looked for possible solutions and came across these catears. But before ordering something pre-made so seemingly simple, I wanted to try making something like this myself.
So, I cut a sock, glued on a bit of velcro and wrapped the whole thing around my helmet strap. Et voilà.
And it indeed works and reduces the wind noise significantly. And it does not look too strange IMO.