Gotcha. Just wanted to be sure we were on the same page. I have never seen any documentation on the dB range for any of the Wyze Cams. However, what you are requesting is a feature enhancement.
If you would like to request that Wyze add this feature, that is handled thru a new topic post in the Wishlist. Go to the Wishlist, search the topics for one that matches your request. If you find one, vote for it at the top, like 
some posts, and add your reply post to support the request. If you do not find a match, submit a new topic for approval.
I did find one post in the Wishlist already that mentions this feature request. Perhaps posting your request as a reply there will meet your request needs.