Years ago when I needed tires for my 1965 Rambler, I bought a set of Atlas tires from the Standard Oil station where I did business. I found the tires were noisy on wet pavement. It bothered me until I realized that these tires also gave much better traction on the wet pavement than did the previous tires on the car.
Back in the 1950’s, my dad put snow tires on the rear wheels of the car. They made noise on dry pavement, but did give us good traction on snow covered roads.
Since your noise is only between 40-50 mph, I think I would turn up the radio and live with it, particularly since you have no other problems.