Windows notification sound:
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Faulty air conditioning, vibration noise
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Clothes dryer
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Sound to start presentation
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Computer turning on, off, humming fan
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SMS notification sound
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Whatsapp notification sound
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Email message sound
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Fan blade rotation, air cut
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Off, Air conditioning, on
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An electric toothbrush
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Air conditioning (outdoor unit)
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A vacuum cleaner
★★★★★