Computer turning on, off, humming fan:
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Windows notification sound
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Off, Air conditioning, on
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Electronic melody for SMS alerts
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Portable fan
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IPhone notification sound
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Old tv on, off
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Electric wheelchair
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Vibration noise, Faulty air conditioning
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Sound to start presentation
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Exhaust fan
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Humming fan, off, Computer turning on
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Air cut, Fan blade rotation
★★★★★