Turning on the laptop, fan noise, shutting down:
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Opens, disc read, closes the CD / DVD tray
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Turn on, turn off the hard drive
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Jet printer
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Disc read, CD / DVD drive
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Turning on the laptop, fan noise, shutting
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Pressing a keypad, input error sound
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Photocopy (photocopy)
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Modem connection, interference, signal
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Computer mouse movement
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Old computer keyboard
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Franking machine
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Office work, general noise
★★★★★