My 2013 Accord Sport, 120K miles, recently developed a buzzing sound in the area of the driver side pillar that was driving my wife crazy (her hearing is much better than mine). It was only present above 50 mph or so. It turned out to be coming from the inboard side of the pillar, within the gap between the pillar and the windshield. I diagnosed it by putting masking tape over different gaps in that general area of the car one at a time until she confirmed that the noise had gone away. The fix (that may not appeal to aesthetic purists) was to apply a thin bead of clear silicone to that gap to keep the wind out. Hope this helps someone.