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  2. Facial symmetry - Wikipedia

    en.wikipedia.org/wiki/Facial_symmetry

    Aurofacial asymmetry (from Latin auris 'ear' and facies 'face') is an example of directed asymmetry of the face. It refers to the left-sided offset of the face (i.e. eyes, nose, and mouth) with respect to the ears. On average, the face's offset is slightly to the left, meaning that the right side of the face appears larger than the left side.

  3. Tympanometry - Wikipedia

    en.wikipedia.org/wiki/Tympanometry

    Tympanometry is an objective test of middle-ear function. It is not a hearing test, but rather a measure of energy transmission through the middle ear. It is not a measure of eardrum or middle ear mobility. It is an acoustic measure, measured by a microphone, as part of the ear canal probe, inserted into the ear canal.

  4. Ear saver - Wikipedia

    en.wikipedia.org/wiki/Ear_saver

    An ear saver, also known as mask strain release strap or mask extender, [1] is an accessory to personal protective equipment (PPE), relieves strain on a mask wearer's ears created through the loops of masks. Ear savers were designed as novel items during the COVID-19 pandemic by the open-source hardware community in response to requests from ...

  5. Audiometry - Wikipedia

    en.wikipedia.org/wiki/Audiometry

    Electronystagmography (ENG) uses skin electrodes and an electronic recording device to measure nystagmus evoked by procedures such as caloric stimulation of the ear Acoustic immittance audiometry - Immittance audiometry is an objective technique which evaluates middle ear function by three procedures: static immittance, tympanometry, and the ...

  6. Equal-loudness contour - Wikipedia

    en.wikipedia.org/wiki/Equal-loudness_contour

    The first research on the topic of how the ear hears different frequencies at different levels was conducted by Fletcher and Munson in 1933. Until recently, it was common to see the term Fletcher–Munson used to refer to equal-loudness contours generally, even though a re-determination was carried out by Robinson and Dadson in 1956, which became the basis for an ISO 226 standard.

  7. Cuba's electric grid collapses after power plant failure ...

    www.aol.com/news/cubas-electric-grid-collapses...

    HAVANA (Reuters) -Cuba's national electrical system collapsed early on Wednesday morning after the country's largest power plant failed, the government said, the latest of several such failures as ...

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