Well third time is the charm. After the first unit I bought, I called support got a replacement but the replacement was a refurbished unit. That one had the same issue. Called again, got a really good support rep, he got me out a new one asap. And this one works.
I am sure there are many different "noise" complaints that Ring gets and there are many factors that come into play for the different noises but the ones that I and others provided examples of on this forum are a specific issue with the unit. From my opinion, there is no firmware fix or trouble shooting fix that will resolve the issue.
The easiest way to know if you are having this specific issue is to bring it inside to eliminate any outside noise. Get as close to your router as possible to eliminate any wifi connectivity issues and make it dark enough for the unit to kick into night vision mode. While its recording put the unit up to your ear. You should be able to hear the noise coming from the unit. It’s not as loud as you would think it would be but you can clearly hear it.
Here is what it should sound like (new unit):
This is what noise you shouldn't get (first unit):
I just installed the Ring Video Doorbell 2 weeks ago and also have this white noise mentioned in blogs. Tried all the trouble shooting tips and still have the white noise. This is definetely either hardware or software for sure. It's a joke to put one through all this for a $200 product. Since I purchased the unit during the Christmas holidays it is beyond the return date or else I would return for a refund. This is definetely on Ring for sure. hopefully a firmware update or something is in the works.
I finally got a new Doorbell 2 sent to me and it does not have the humming in night mode. I am so glad I did not have to go through multiple returns.