When running full blast
much quieter than my klitchen blender. When dialed down for best cutting harmonics, it is so quiet I can take phone calls while sitting close by the machine. I have them on both my TS and CueMonster, even both at once is not annoying, nor do I need hearing protection. Now if I start up a Porter Cable router, look out! Now I need my ear muffs. And the NSK spindle they use on the QR is quite accurate as well. I have no regrets about having acquired them for my shop.