Modem connection, signal, interference:
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Manual copy machine
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Computer mouse click
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Laser printer
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Pressing a keypad, input error sound
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Removed, The USB flash drive is inserted
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Opening, closing the laptop cover
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Turn on, turn off the old monitor
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Signal read information, Computer interface
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Turning on the laptop, shutting, fan noise
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Jet printer
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Office work, general noise
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Computer simulated laser
★★★★★