Modem connection, signal, interference:
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Matrix printer
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Office work, general noise
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Turn off the old monitor, Turn on
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Opening, closing the laptop cover
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Jet printer
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Computer interface, alarm
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Photocopy (photocopy)
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Computer keyboard
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Turn off the old computer, Turn on
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Modem connection, signal, interference
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Old computer keyboard
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Fan noise, shutting, Turning on the laptop
★★★★★