this post was submitted on 16 Aug 2025
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Active noise cancellation does better on low-frequency sound. Passive stuff, like more sound absorbing material, and a thicker, hard shell does better with high-frequency sound. So they aren't really perfect drop-in replacements for each other, more complement each other...but they do do some of the same job.
One day, I hope that there'll be something like those 3M Peltor sound protector things
which have very good passive sound isolation
with good ANC on them (3M did apparently go out and do ANC on a Peltor ear protector, but I understand that the ANC there isn't very good).
You can get anc earbuds and wear those ear protectors over them
Yeah, I've read about some people doing that, but I don't really like earbuds in general, just don't like wearing them for long periods of time. I'll use them if I can't carry headphones and need a compact option, but I really prefer having headphones. Might be a good option for some folks, though.
I find ANC does far better with upper frequencies. Blocking your ear canal works for lower frequencies, but only to a point, since the lower it is, the more it'll simply conduct via your body.
Like a fire truck horn I "hear" through my body with earplugs and well-fitting ANC headphones (ones that cover ears entirely).