Windows notification sound:
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IPhone notification sound
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Email message sound
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Off, Old tv on
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Electronic melody for SMS alerts
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Spin, read, Hard disk
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On, off, Air conditioning
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Air conditioning (outdoor unit)
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Computer turning on, off, humming fan
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Spaceship freezer, defrost process
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Faulty air conditioning, vibration noise
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Windows notification sound
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A vacuum cleaner
★★★★★
