I don't have a better meter to lay around and check accuracy; However, it's very consistent for things I measure frequently and for items I have in previous manufacturer specs. It has the lowest reading level of 30dBA. I wish it was lower, but 95% of the scenarios would be unnecessary as most rooms have "quiet" background noise above 30dBA. However, in a well-soundproofed room, it can be a good idea to accurately measure a few things (e.g. PC fans). I bought this primarily to test the noiseβ¦