I think the Jopen vr6 is very quiet in relation to its strength. Especially once inserted, the sound is muffled even more. Just now out of curiosity I turned it on while holding in my hand, I was standing in my kitchen & the fridge cycled on. It's barely as loud as the fridge. If that helps at all...hmm, perhaps instead of 'bee' rating, I'll use a refrigerator noise rating scale!