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  2. Tourmaline - Wikipedia

    en.wikipedia.org/wiki/Tourmaline

    Tourmaline was sometimes called the "Ceylonese Magnet" because it could attract and then repel hot ashes due to its pyroelectric properties. [ 5 ] Tourmalines were used by chemists in the 19th century to polarize light by shining rays onto a cut and polished surface of the gem.

  3. Hearing loss - Wikipedia

    en.wikipedia.org/wiki/Hearing_loss

    Hearing loss is a partial or total inability to hear. [5] Hearing loss may be present at birth or acquired at any time afterwards. [6] [7] Hearing loss may occur in one or both ears. [2] In children, hearing problems can affect the ability to acquire spoken language, and in adults it can create difficulties with social interaction and at work. [8]

  4. Auditory fatigue - Wikipedia

    en.wikipedia.org/wiki/Auditory_fatigue

    Auditory fatigue is defined as a temporary loss of hearing after exposure to sound. This results in a temporary shift of the auditory threshold known as a temporary threshold shift (TTS). The damage can become permanent ( permanent threshold shift , PTS) if sufficient recovery time is not allowed before continued sound exposure. [ 1 ]

  5. Elbaite - Wikipedia

    en.wikipedia.org/wiki/Elbaite

    Elbaite, a sodium, lithium, aluminium boro-silicate, with the chemical composition Na(Li 1.5 Al 1.5)Al 6 Si 6 O 18 (BO 3) 3 (OH) 4, [4] is a mineral species belonging to the six-member ring cyclosilicate tourmaline group. Elbaite forms three series, with dravite, with fluor-liddicoatite, and with schorl.

  6. Fluor-buergerite - Wikipedia

    en.wikipedia.org/wiki/Fluor-buergerite

    Fluor-buergerite, [5] originally named buergerite, is a mineral species belonging to the tourmaline group. It was first described for an occurrence in rhyolitic cavities near Mexquitic, San Luis Potosi , Mexico .

  7. Auditory system - Wikipedia

    en.wikipedia.org/wiki/Auditory_system

    The auditory system is the sensory system for the sense of hearing. It includes both the sensory organs (the ears) and the auditory parts of the sensory system . [ 1 ]