Laser printer:
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Photocopy (photocopy)
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CD / DVD drive, disc read
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Floppy disk reading
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Environmental sounds, Office work, typewriter
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Turn off the old computer, Turn on
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Franking machine
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Closing the laptop cover, Opening
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Laser printer
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Signals, Computer interface
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Shutting, fan noise, Turning on the computer
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Bios, Sound signal of a bios computer
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Signal, Modem connection, interference
★★★★★