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  2. Earmuffs - Wikipedia

    en.wikipedia.org/wiki/Earmuffs

    Firearms range from a noise level of 140 dB to 175 dB depending on the firearm type. It is recommended to use dual hearing protection (earmuffs and earplugs together) when using firearms. [10] Exposure to loud noises damages the hair cells in the inner ear that are essential for sending neural impulses to the brain in order to perceive sounds.

  3. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    Ear cups are usually lined with a sound-absorbing material, such as foam. The cups should be fit so that the center of the ear canal aligns with the ear canal opening. [1] The soft cushions seal around the pinna of the ears. The head band, centered at the top of the head, applies force/pressure to seal the ear cups over the ears. [1]

  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. Motorcycle personal protective equipment - Wikipedia

    en.wikipedia.org/wiki/Motorcycle_personal...

    Motorcycle goggles or glasses help protect the eyes from dust, wind and debris while riding and typically feature anti-fog treatment and protection against UV rays. For motorcycle sports such as motocross, goggles typically feature a foam rim which seals against the face and layered, tinted lenses to accommodate for varying light conditions.

  6. Muffler - Wikipedia

    en.wikipedia.org/wiki/Muffler

    Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...

  7. Hearing aid - Wikipedia

    en.wikipedia.org/wiki/Hearing_aid

    A modern behind the ear hearing aid with a minicell battery. Behind the ear hearing aids are one of two major classes of hearing aids – behind the ear (BTE) and in the ear (ITE). These two classes are distinguished by where the hearing aid is worn. BTE hearing aids consist of a case which hangs behind the pinna. The case is attached to an ...

  8. Motorcycle safety - Wikipedia

    en.wikipedia.org/wiki/Motorcycle_safety

    US Navy motorcycle training at Imperial Beach. Motorcycle safety is the study of the risks and dangers of motorcycling, and the approaches to mitigate that risk, focusing on motorcycle design, road design and traffic rules, rider training, and the cultural attitudes of motorcyclists and other road users.

  9. Chester Greenwood - Wikipedia

    en.wikipedia.org/wiki/Chester_Greenwood

    Chester Greenwood (December 4, 1858 – July 5, 1937) was an American engineer and inventor, known for inventing the earmuffs in 1873. [1] He reportedly came up with the idea while ice skating and he asked his grandmother to sew tufts of fur between loops of wire. [2]

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