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  2. Hearing protection fit-testing - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_fit-testing

    Hearing protector fit-testing is a method that measures the degree of noise reduction obtained from an individual wearing a particular hearing protection device (HPD) - for example, a noise canceling earplug or earmuff. Fit testing is necessary because noise attenuation varies across individuals.

  3. The Best Decibel Meter Apps In 2024 - AOL

    www.aol.com/best-decibel-meter-apps-2024...

    Sounds above 80 dB can cause hearing damage, and we should limit the exposure to prevent hearing loss. Decibel apps are a convenient way to measure volume fairly accurately with your phone.

  4. Hearing test - Wikipedia

    en.wikipedia.org/wiki/Hearing_test

    A hearing test provides an evaluation of the sensitivity of a person's sense of hearing and is most often performed by an audiologist using an audiometer. An audiometer is used to determine a person's hearing sensitivity at different frequencies. There are other hearing tests as well, e.g., Weber test and Rinne test.

  5. Walgreens Boots Alliance - Wikipedia

    en.wikipedia.org/wiki/Walgreens_Boots_Alliance

    Walgreens Boots Alliance, Inc. (WBA) is an American multinational holding company headquartered in Deerfield, Illinois. [2] The company was formed on December 31, 2014, after Walgreens bought the 55% stake in Alliance Boots (owner of Boots UK Limited ) that it did not already own.

  6. Boots (company) - Wikipedia

    en.wikipedia.org/wiki/Boots_(company)

    An advertisement for Boots from 1911. Boots was established in 1849, by John Boot. [7] After his father's death in 1860, Jesse Boot, aged 10, helped his mother run the family's herbal medicine shop in Nottingham, [8] which was incorporated as Boot and Co. Ltd in 1883, becoming Boots Pure Drug Company Ltd in 1888.

  7. Tone decay test - Wikipedia

    en.wikipedia.org/wiki/Tone_decay_test

    The tone decay test (also known as the threshold tone decay test or TTDT) is used in audiology to detect and measure auditory fatigue. It was developed by Raymond Carhart in 1957. In people with normal hearing, a tone whose intensity is only slightly above their absolute threshold of hearing can be heard continuously for 60 seconds.

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