Spaceship freezer, defrost process:
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Electronic melody for SMS alerts
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Android notification sound
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Portable fan
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An electric toothbrush
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Off, Air conditioning, on
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Computer turning on, off, humming fan
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A vacuum cleaner
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Faulty air conditioning, vibration noise
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Sound to start presentation
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Sewing machine
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Read, Hard disk, spin
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Fan blade rotation, air cut
★★★★★