The others were correct. It was the neighbors low battery smoke alarm. I had high suspicion that it was that. But not hearing it thru neighbors door. And with

The others were correct. It was the neighbors low battery smoke alarm. I had high suspicion that it was that. But not hearing it thru neighbors door. And with how loud it was and the fact I could hear it thru my front door and not theirs. Made the hunt for it so much harder.