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  2. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise and provide hearing protection to help prevent noise-induced hearing loss. HPDs reduce the level of the noise entering the ear.

  3. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Fogel is considered to be the inventor of active noise cancellation, and he designed one of the first noise-cancelling headphones systems. Later on, Willard Meeker designed an active noise control model that was applied to circumaural earmuffs for advanced hearing protection. Noise-cancelling aviation headsets are now commonly available. [5] [6]

  4. 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 ...

  5. I Tested Sony’s New Noise-Canceling Headphones on a ... - AOL

    www.aol.com/news/tested-sony-noise-canceling...

    Scouted/The Daily Beast/Sony.Scouted selects products independently. If you purchase something from our posts, we may earn a small commission.Picture this: You are on a plane. You already got ...

  6. Ear protection - Wikipedia

    en.wikipedia.org/wiki/Ear_protection

    Ear protection may pertain to protecting the ear from cold, intrusion by water or debris, or noise. It may refer to: Hearing protection device; Earplug; Earmuffs

  7. Earmuffs - Wikipedia

    en.wikipedia.org/wiki/Earmuffs

    Two people wearing behind-the-neck earmuffs. Thermal earmuffs are worn for protection from the cold. Because the ears extend from the sides of the head to gather sound waves, they have a high skin surface-area-to-volume ratio, and very little muscle tissue, causing them to be one of the first body parts to become uncomfortably cold as temperatures drop.

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