Electric generator (hum):
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Laser welding
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Spectrograph
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Power station turbine
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Lowers forks, Forklift raises
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Noise in, Grind wood with a grinder
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Breakdown press
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General noise, Work in a warehouse, loaders
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Industrial exhaust fan
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Forklift truck moving away
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Automatic telephone switch
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Factory Atmosphere
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Grind metal on a grinding machine in a
★★★★★