(adsbygoogle = window.adsbygoogle || []).push({}); 1. When you buy earplugs at the store, they have a "dB rating". What it tells you is the reduction of SIL that the plugs will provide, if properly worn. Suppose you're helping some friends, working the stage at a rock concert wearing earplugs that provide a reduction of 40 dB. What is the ratio of the sound intensity just outside the plugs to the intensity reaching your eardrums? (40 dB may not seem huge, the music IS still pretty loud, but look what an impact this has on the energy being deposited in your ears!)

2. Relevant equations

-an increase in sound intensity by a factor of 10 increases the dB rating by 10.

-dB measure a ratio.

3. The attempt at a solution

- I tried 40db, thinking that since dB is a ratio, this was the answer. I was wrong.

- I tried 1E-8 as an answer because that is the intensity of 40 dB, but that was incorrect as well.

how do i slove this problem?

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# Homework Help: DB ear plug reduction

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