I know nothing about this subject, but my instinct would tell me that anc would actually be protective. If you phase out sound, it seizes to exist, right? That is the whole point of it?
Again, pure instincts, don’t know shit myself.
Comment on What is the absolute max level of ear protection you can get?
WhoPutDisHere@lemmynsfw.com 5 months ago[deleted]
Drummyralf@lemmy.world 5 months ago
BearOfaTime@lemm.ee 5 months ago
*ceases, FYI (not being snarky, maybe autoincorrect got you on voice to text)
Drummyralf@lemmy.world 5 months ago
Thanks for the heads up. Non-native, always willing to learn.
englislanguage@lemmy.sdf.org 5 months ago
This is partially correct, partially wrong.
As many have commented, flipping a signal by 180° cancels it out. However, this is only true for static noise though. Transient noise cannot be canceled out completely, because you would need to see into the future to know which signals to play to cancel out the noise.
The ANC headphones I own mainly cancel noise through passive shielding of the ears. The “active” noise canceling feature is not contributing a lot.
HelixDab2@lemm.ee 5 months ago
That’s just not true.
Your ear largely hears things through changes in air pressure. Projecting the same frequency and amplitude at the opposite phase prevents the change in air pressure in the first place. It’s literally cancelling the sound.
WhoPutDisHere@lemmynsfw.com 5 months ago
laughterlaughter@lemmy.world 5 months ago
You’re so wrong about this. ANC pretty much eliminates pressure inside the ear canal. That’s how ANC works. No pressure waves, no sound, no damage.
HelixDab2@lemm.ee 5 months ago
You’re not adding more pressure anywhere; you’re cancelling that pressure out.
BearOfaTime@lemm.ee 5 months ago
Except that’s exactly how nose canceling ear phones work. It’s not like that have an external speaker projecting sound 🤦🏼♂️
numberfour002@lemmy.world 5 months ago
Mine work like this: “Got your nose. Neener neener neener.”
WhoPutDisHere@lemmynsfw.com 5 months ago