An electric toothbrush:
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Exhaust fan
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Air conditioning, on, off
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Read, spin, Hard disk
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Air conditioning (outdoor unit)
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Sound to start presentation
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Off, humming fan, Computer turning on
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IPhone notification sound
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Whatsapp notification sound
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Spaceship freezer, defrost process
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Android notification sound
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Fan blade rotation, air cut
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Popcorn machine
★★★★★