Modem connection, signal, interference:
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Closes the CD / DVD tray, Opens
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Communication room, computer noise
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Franking machine
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Room noise, Hard disk, write, read
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Turn on, turn off the hard drive
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Matrix printer
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CD / DVD drive, disc read
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Computer interface, alarm
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Photocopy (photocopy)
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Jet printer
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Sound signal of a bios computer, bios
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Turning on the computer, fan noise, shutting
★★★★★