Electronic melody for SMS alerts:
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Computer turning on, humming fan, off
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An electric toothbrush
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Off, Old tv on
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Electric wheelchair
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Defrost process, Spaceship freezer
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Faulty air conditioning, vibration noise
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Email message sound
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On, off, Air conditioning
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A vacuum cleaner
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SMS notification sound
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Air conditioning (outdoor unit)
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Windows notification sound
★★★★★