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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

    Hearing protection devices with accurate placement (an airtight seal) and/or accurate insertion (deep into the ear canal) will provide the most attenuation of noise. [1] There are many challenges to achieving the needed protection from the device, from barriers to adequate use, to issues related to comfort, convenience, lack of training, to ...

  4. 8 white noise machines for better sleep - AOL

    www.aol.com/news/8-white-noise-machines-better...

    Sleep experts say using a white noise machine can improve sleep. Here, editor-tested picks from Hatch, HoMedics, YogaSleep and more. 8 white noise machines for better sleep

  5. Electronic fluency device - Wikipedia

    en.wikipedia.org/wiki/Electronic_fluency_device

    Electronic fluency devices (also known as assistive devices, electronic aids, altered auditory feedback devices and altered feedback devices) are electronic devices intended to improve the fluency of persons who stutter. Most electronic fluency devices change the sound of the user's voice in his or her ear.

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

    www.aol.com/lifestyle/very-best-earplugs...

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  7. Noise-induced hearing loss - Wikipedia

    en.wikipedia.org/wiki/Noise-induced_hearing_loss

    Passive ear protection includes earplugs or earmuffs which can block noise up to a specific frequency. Earplugs and earmuffs can provide the wearer with 10 dB to 40 dB of attenuation. [ 99 ] However, use of earplugs is only effective if the users have been educated and use them properly; without proper use, protection falls far below ...

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