Modem connection, signal, interference:
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Turn on, turn off the hard drive
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Computer mouse movement
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Matrix printer
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Double click computer mouse
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Closing the laptop cover, Opening
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Floppy disk reading
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Signals, Computer interface
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Opens, closes the CD / DVD tray, disc read
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Jet printer
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Turn off the old monitor, Turn on
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Bios, Sound signal of a bios computer
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Turning on the laptop, shutting, fan noise
★★★★★