Office work, general noise:
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Manual copy machine
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Computer mouse click
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Signal, Modem connection, interference
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Matrix printer
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Closes the CD / DVD tray, disc read, Opens
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Old computer keyboard
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Jet printer
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Turn off the hard drive, Turn on
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Computer mouse movement
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Signals, Computer interface
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Computer noise, Communication room
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Closes the CD / DVD tray, Opens
★★★★★