An electric toothbrush:
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Electronic melody for SMS alerts
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Spin, Hard disk, read
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Faulty air conditioning, vibration noise
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Defrost process, Spaceship freezer
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Android notification sound
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Exhaust fan
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SMS notification sound
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Air conditioning (outdoor unit)
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IPhone notification sound
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Portable fan
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Off, Air conditioning, on
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Whatsapp notification sound
★★★★★