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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. Cold saw - Wikipedia

   en.wikipedia.org/wiki/Cold_saw

   Portable cold saw with the chip catcher detached. A cold saw is a circular saw designed to cut metal which uses a toothed blade to transfer the heat generated by cutting to the chips created by the saw blade, allowing both the blade and material being cut to remain cool. [1]

4. Sound exposure - Wikipedia

   en.wikipedia.org/wiki/Sound_exposure

   The commonly used reference sound exposure in air is [2] E 0 = 400 μ P a 2 ⋅ s . {\displaystyle E_{0}=400~\mathrm {\mu Pa^{2}\cdot s} .} The proper notations for sound exposure level using this reference are L W /(400 μPa 2 ⋅s) or L W (re 400 μPa 2 ⋅s) , but the notations dB SEL , dB(SEL) , dBSEL, or dB SEL are very common, even if ...

5. Sawhorse - Wikipedia

   en.wikipedia.org/wiki/Sawhorse

   Lightweight, stack-able, saw horses from the book Agricultural Woodworking: a group of problems for rural and graded schools ... by Louis Michael Roehl. 1916. In woodworking, a saw-horse or sawhorse (saw-buck, trestle, buck) [1] is a trestle structure used to support a board or plank for sawing. A pair of sawhorses can support a plank, forming ...

6. 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 ...

7. Noise curve - Wikipedia

   en.wikipedia.org/wiki/Noise_curve

   Noise curves reflect different standardized means of creating a single number rating for the background noise spectrum in a space. Different rooms, locations, regulations, and applications may allow different acceptable noise ratings. In most cases, the goal is that background noise should not interfere with the purpose of the room, e.g. the ...