Windows notification sound:
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Faulty air conditioning, vibration noise
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Computer turning on, humming fan, off
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Old tv on, off
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Email message sound
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Air conditioning (outdoor unit)
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IPhone notification sound
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Exhaust fan
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Cool sound for notification
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Popcorn machine
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Off, Air conditioning, on
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Defrost process, Spaceship freezer
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Sewing machine
★★★★★