Modem connection, signal, interference:
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Laser printer
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Turn off the hard drive, Turn on
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Sound signal of a bios computer, bios
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Read, Hard disk, write, room noise
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Removed, The USB flash drive is inserted
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Input error sound, Pressing a keypad
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Signal, interference, Modem connection
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Manual copy machine
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Typewriter, Office work, environmental sounds
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Computer keyboard
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Matrix printer
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Closes the CD / DVD tray, Opens
★★★★★