Clothes dryer:
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A vacuum cleaner
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Fan blade rotation, air cut
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Portable fan
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Sound to start presentation
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Hard disk, spin, read
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IPhone notification sound
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Defrost process, Spaceship freezer
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Air conditioning (outdoor unit)
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Electric razor
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An electric toothbrush
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Off, humming fan, Computer turning on
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Faulty air conditioning, vibration noise
★★★★★