Modem connection, signal, interference:
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Signal read information, Computer interface
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Read, room noise, write, Hard disk
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Manual copy machine
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Computer keyboard
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Removed, The USB flash drive is inserted
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General noise, Office work
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Turn on, turn off the old monitor
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Photocopy (photocopy)
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Matrix printer
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Typewriter, Office work, environmental sounds
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Shutting, Turning on the laptop, fan noise
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Double click computer mouse
★★★★★