Modem connection, signal, interference:
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Photocopy (photocopy)
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The USB flash drive is inserted, removed
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Signal, Modem connection, interference
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Bios, Sound signal of a bios computer
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Office work, general noise
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Turn on, turn off the hard drive
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Franking machine
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Computer mouse click
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Turning on the laptop, shutting, fan noise
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Read the, Insert the disk into the drive
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Typewriter, environmental sounds, Office work
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Turn off the old computer, Turn on
★★★★★