Popcorn machine:
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Sewing machine
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Air conditioning (outdoor unit)
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Windows notification sound
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On, off, Air conditioning
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Android notification sound
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Electronic melody for SMS alerts
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Computer turning on, off, humming fan
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Air cut, Fan blade rotation
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Spin, read, Hard disk
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Faulty air conditioning, vibration noise
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Portable fan
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Electric razor
★★★★★