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  2. NIOSH Power Tools Database - Wikipedia

    en.wikipedia.org/wiki/NIOSH_Power_Tools_Database

    According to NIOSH, the Power Tools Database "is particularly helpful in determining the 'real-world' noise level of power tools as they are used on the job." [ 1 ] [ 2 ] The database is a part of the much larger Hearing Loss Prevention Research Program conducted by NIOSH.

  3. Decibel - Wikipedia

    en.wikipedia.org/wiki/Decibel

    The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...

  4. Noise curve - Wikipedia

    en.wikipedia.org/wiki/Noise_curve

    Noise curves are a common way to characterise background noise in unoccupied buildings and spaces. [1] Their purpose is to produce a single-value representation of a complete sound spectrum. International standards organizations ( ISO , [ 2 ] ANSI [ 3 ] and ASA ) recognize the need to objectify judgements on the amount of ambient noise in ...

  5. Equine intelligence - Wikipedia

    en.wikipedia.org/wiki/Equine_intelligence

    Engraving depicting Marocco, a performing horse.. Most medieval technical literature consists of treatises on hippiatry, or veterinary care manuals. [S 11] Arab-Muslim civilization made significant contributions to the knowledge of equine medicine, education, [5] and training, thanks in part to the translator Ibn Akhî Hizâm, who wrote around 895, [6] and Ibn al-Awam, who advocated against ...

  6. Two-man saw - Wikipedia

    en.wikipedia.org/wiki/Two-man_saw

    Two-man saws were known to the ancient Romans, but first became common in Europe in the mid-15th century. In America, crosscut saws were used as early as the mid-17th century, but felling saws only began to replace axes for felling trees in the late 19th century. [2] Some Japanese saws are used by two persons, although they are of a different ...

  7. Animal lover beaten to death on Christmas Eve while trying to ...

    www.aol.com/animal-lover-beaten-death-pipe...

    Robert "Bobby" Cavanaugh, of Madison Heights, Michigan, was beaten to death on Christmas Eve after he tried to save a dog who was being abused by a neighbor and alleged repeated felon, witnesses said.

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