Just to be as sure as we can to eliminate the possibility of the barking noise potentially being created through a feedback loop as I think @angus.black also thought of checking for here:
I know you are saying here that you heard the barking noise from the camera itself here.
Just to try and further eliminate feedback noise as some degree of a possibility here, it might help us with that if we can ask you also:
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Did your phone happen to be very near the WyzeCam and in an unlocked state?
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If The answer is yes, it might help us more if you can remember if the Wyze app was actively running in the foreground?
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If no, then it seems that a feedback loop was Not created between the phone and the camera (when this happens all kinds of crazy strange noises can occur… I have never had that happen with a WyzeCam though personally)