Spaceship freezer, defrost process:
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Electronic melody for SMS alerts
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Whatsapp notification sound
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Popcorn machine
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Air conditioning (outdoor unit)
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Hissing old tv
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Windows notification sound
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Portable fan
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Fan blade rotation, air cut
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Email message sound
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Defrost process, Spaceship freezer
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Cool sound for notification
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Vibration noise, Faulty air conditioning
★★★★★