Photocopy (photocopy):
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Computer noise, Communication room
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Shutting, fan noise, Turning on the computer
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Repeatedly pressing a computer mouse
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Computer keyboard
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Matrix printer
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Removed, The USB flash drive is inserted
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Computer mouse movement
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Turning on the laptop, fan noise, shutting
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CD / DVD drive, disc read
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Office work, general noise
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Bios, Sound signal of a bios computer
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Modem connection, signal, interference
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