Computer interface, alarm:
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Computer simulated laser
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Jet printer
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Matrix printer
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Interference, Modem connection, signal
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Franking machine
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Disc read, Opens, closes the CD / DVD tray
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Shutting, Turning on the laptop, fan noise
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Turning on the computer, shutting, fan noise
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General noise, Office work
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Turn off the hard drive, Turn on
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Photocopy (photocopy)
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Room noise, Hard disk, write, read
★★★★★