I was sitting on my couch the other day which is my listening spot in my 1 BR apt. Mid day and it was very quiet. I'm on a dead end with woods behind me and no street noise. I checked the sound levels suing a cell phone app and it was ranging between 27 and 32 db consistently. Curious about others experiences. I doubt you could get much lower than these readings. I am near bldg entrance so i do get entrance and exit noise periodically.