To help sort out possible tire/road interaction noise, over-inflate them to about 55# (just for test purposes they won't blow up or anything just be easier to bruise) and run it on the same pavement where you notice the noise. If it is tires, the sound should be much different at the higher pressure. Br sure and deflate to correct pressures after testing

'Up Nawth', use of studded snow tires has seriously erroded the traffic lanes of much of the pavement and you can get lots of weird and unfamiliar tire/road noise. Since its been a real mild (no-snow) winter, lots of road wear may have occurred.