Mathematics, 12.03.2020 02:39 punchbug007
Earplugs you can buy in the drugstore have a noise reduction rating of 23 decibels. if you are wearing those earplugs but your friend phil is not, how far from the speaker should phil stand to experience the same loudness as you?
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Earplugs you can buy in the drugstore have a noise reduction rating of 23 decibels. if you are weari...
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