My HHKB Hybrid Type-S is definitely less noisy than MX-Brown (at least in WASD keyboards edition).
It may be more silent than my typing on macbook air, but it's hard to compare because it produces lower frequencies, definitely nicer sound than macbook keyboard to me and never even thought about it as noisy.
It may be more silent than my typing on macbook air, but it's hard to compare because it produces lower frequencies, definitely nicer sound than macbook keyboard to me and never even thought about it as noisy.