The USB flash drive is inserted, removed from the usb connector:
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Read, Hard disk, write, room noise
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Double click computer mouse
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Modem connection, signal, interference
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Computer mouse click
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Computer simulated laser
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Turn on, turn off the old monitor
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Office work, general noise
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Matrix printer
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Turn off the old computer, Turn on
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Fan noise, shutting, Turning on the computer
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Floppy disk reading
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Photocopy (photocopy)
★★★★★