The classic way of telling is when you have ringing in your ears. It's a very common outcome of exposure to too loud of music.

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You tend to have less hearing loss listening to something you like versus something that's just scrutiny.

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Even at 85 decibels, you may not experience it that day, that week or that year, [but] if you continue listening to noise at that level you could have [hearing] damage over time.

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