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2. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Using both ear muffs (whether passive or active) and earplugs simultaneously results in maximum protection, but the efficacy of such combined protection relative to preventing permanent ear damage is inconclusive, with evidence indicating that a combined noise reduction ratio (NRR) of only 36 dB (C-weighted) is the maximum possible using ear ...

3. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   Single-use, disposable earplugs are available in addition to reusable options. [31] Earplugs intended for single-use should not be washed for reuse as this degrades the material and reduces effectiveness. [32] Most reusable earplugs can be cleaned using mild soap and warm water between uses and should be replaced every 2–4 weeks. [31]

4. The Very Best Earplugs for Sleeping, According to Sleep ... - AOL

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5. People can't stop buying these earplugs from 'Shark Tank' - AOL

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   After the earplugs went viral on ABC's hit show, "Shark Tank," Jack Mann, the founder of Vibes earplug has since reached all different types of customers. From U.S. military skydivers to children ...

6. Hearing protection fit-testing - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_fit-testing

   The second earplug is then placed in the other ear and the procedure is repeated a third time. The required increase in loudness this time represents the noise reduction achieved in the second ear. The loudness balance fit-testing approach provides individual personal attenuation ratings for each ear.

7. Are These $65 Earplugs Actually Worth It? - AOL

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