Insert the disk into the drive, read the disk, take it out:
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Disc read, CD / DVD drive
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Signal, Modem connection, interference
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General noise, Office work
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Turning on the computer, fan noise, shutting
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Computer noise, Communication room
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Room noise, Hard disk, read, write
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Manual copy machine
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Turn off the old monitor, Turn on
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Computer mouse movement
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The USB flash drive is inserted, removed
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Sound signal of a bios computer, bios
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Typewriter, Office work, environmental sounds
★★★★★