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  2. NIOSH Power Tools Database - Wikipedia

    en.wikipedia.org/wiki/NIOSH_Power_Tools_Database

    A substantial part of this noise results from the use of power tools, which can produce dangerous levels of noise by themselves. [6] Although the loudness of power tools may be quite apparent to those using them, the actual level of noise produced was mostly unreported and not available easily in an online reference.

  3. Don't Lose The Music - Wikipedia

    en.wikipedia.org/wiki/Don't_Lose_The_Music

    0 dB(A) - the lowest sound level a person with normal hearing can detect [4] 20 dB(A) - a quiet room at night; 60 dB(A) - ordinary spoken conversation; 80 dB(A) - shouting; 90 dB(A) - an underground railway; 110 dB(A) - a pneumatic drill nearby; 130 dB(A) - an aeroplane taking off 100m (330 feet) away

  4. Pneumatic tool - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_tool

    A pneumatic tool, air tool, air-powered tool or pneumatic-powered tool is a type of power tool, driven by compressed air supplied by an air compressor. Pneumatic tools can also be driven by compressed carbon dioxide (CO 2) stored in small cylinders allowing for portability. [1] Most pneumatic tools convert the compressed air to work using a ...

  5. Jackhammer - Wikipedia

    en.wikipedia.org/wiki/Jackhammer

    A pneumatic jackhammer, also known as a pneumatic drill or pneumatic hammer, [20] is a jackhammer that uses compressed air as the power source. The air supply usually comes from a portable air compressor driven by a diesel engine. Reciprocating compressors were formerly used.

  6. Engineering controls - Wikipedia

    en.wikipedia.org/wiki/Engineering_controls

    The exchange rate means that when the noise level is increased by either 3 dBA (according to the NIOSH REL) or 5 dBA (according to the OSHA PEL), the amount of time a person can be exposed to a certain noise level to receive the same dose is cut in half. Exposures at or above these levels are considered hazardous. The Hierarchy of Controls ...

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  8. 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 ...

  9. Needlegun scaler - Wikipedia

    en.wikipedia.org/wiki/Needlegun_scaler

    [3] [2] Different models offer choices of number of needles, operating speed, and power levels. [3] Many models use compressed air, although electrical needle-guns do exist. [3] [6] In a pneumatic unit, compressed air forces a piston forwards and backwards. [3] This movement causes the needles to move back and forth against the work surface. [3]

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