Popcorn machine:
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Electric wheelchair
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Sound to start presentation
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Air cut, Fan blade rotation
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Defrost process, Spaceship freezer
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Computer turning on, off, humming fan
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SMS notification sound
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Hissing old tv
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Vibration noise, Faulty air conditioning
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Popcorn machine
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Whatsapp notification sound
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Windows notification sound
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Exhaust fan
★★★★★