An electric toothbrush:
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Clothes dryer
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Humming fan, off, Computer turning on
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Sound to start presentation
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Popcorn machine
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Cool sound for notification
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Electronic melody for SMS alerts
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Electric razor
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An electric toothbrush
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Email message sound
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A vacuum cleaner
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Faulty air conditioning, vibration noise
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Whatsapp notification sound
★★★★★