In a post on the Pixel User Community (via Android Police), Community Manager Orrin announced that Google will be pushing out a software update in the coming weeks that will fix the problem. “We’re rolling out a software update in the coming weeks which eliminates a faint buzzing sound on some Pixel 2 devices when the phone is placed to your ear during a phone call.”
There are no specific dates mentioned, so we guess owners of the Pixel 2 handsets will just have to wait for it, but we’ll definitely be keeping an eye out for its release. In the meantime Google has already fixed a problem which involved the handset making weird clicking sounds, so this appears to be next on the list. Hopefully when this update is released it will address the buzzing sounds and some of the other problems plaguing the handset.