I bought a Harbor Freight 2hp dust collector while it was 20% off to use in lieu of something better when I get my detached shop built. I expected noise but when I turned it on for the first time I was unprepared for the level of sound it makes. Attaching a 4" flex hose on the suction side seemed to quiet it down a bit.
Moments ago I downloaded a decimeter and got a reading of about 80db.
Those of you who have this unit, is that about the same level of noise you get.
I tried recalibrating the app but it was pretty close to the setting it came with. Considering the level of noise I was expecting a reading over 100. I consider this to be ear plugs and head phones noise.