A:Answer This link provided noise level at different running speeds :
https://afresherhome.com/honeywell-hpa-300-review/#Noise_levels_during_use
I have seen different numbers from other reviewers.
When running the lowest speed (germ mode), the noise level is pretty acceptable, I can watch TV with it running nearby.
I recall seeing other reviewer had germ mode at 41dB, this maybe because they were measured differently (different distance, height........)