Portable fan:
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Hissing old tv
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An electric toothbrush
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IPhone notification sound
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Spaceship freezer, defrost process
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Windows notification sound
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Off, Old tv on
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A vacuum cleaner
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Air cut, Fan blade rotation
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Computer turning on, off, humming fan
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Popcorn machine
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Electronic melody for SMS alerts
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Whatsapp notification sound
★★★★★