for example, you’re in a loud train station or in a place with loud tools but you hardly hear anything with noise cancelation. why is this not considered hearing protection?
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Hearing protection actually blocks out sound pressure (which causes direct physical damage to some parts of the inner ear).
Noise-cancelling doesn’t do that. Noise cancellation technology makes noise of its own, designed to create an interference patter with sounds you hear so that they don’t register as noise.
So… if you’re going to be in an industrial or other loud environment (concert, shooting range, trainyard, etc) where you’re exposed to problematic decibel levels, choose actual hearing protection, not noise-cancelling tech.
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