Considering noise-cancelling headphones. Do they work against fast transients, such as balloon pops & barking dogs, like earplugs do?
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They cancel by frequency response; they aren't "predictive" (that's a misconception). They cancel low to low-mid freqs, and muffle higher.
So effectively they *are* earplugs that also happen to do a better job with lower frequencies. Bose models are pretty good.
