Interesting update to this issue. I have a video from this morning where my family is leaving for school. The doorbell activates due to motion in color. The noise is not there. Then, in the middle of the video, one of the kids blocks the light enough that the doorbell switches to night mode mid recording. The noise starts immediately! This means it is absolutly being caused by the unit itself, and this is the second one with the same behavior. It almost sounds like a bad part in the manufacturing run and my replacement was from the same batch. I have had this happen with aftermarket car parts, where one was defective and all the other parts on the shelf at the auto part store had the same defect.
No resolution from me unfortunately. The guys at Ring kindly replaced my Doorbell 2 which was then the third one I've tried and all did the same thing.
I've decided to live with it rather than not have the Ring doorbell but it's clearly an issue.
I was in touch with Jason with Ring Support. They sent a long list of troubleshooting things to do that have already been done previously by others. Ring does not acknowledge the problem, but it's pretty obvious that's it's a known issue. Ring is junk. The audio quality in particular. It looks great on the TV ads, but does not perform even close to the way they promote it....I will be returning mine to the retailer. Ring Blows!