Modem connection, signal, interference:
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Communication room, computer noise
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Franking machine
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Fan noise, shutting, Turning on the computer
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Office work, typewriter, environmental sounds
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Opening, closing the laptop cover
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Old computer keyboard
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Signal, Modem connection, interference
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Turn off the hard drive, Turn on
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CD / DVD drive, disc read
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Turn on, turn off the old computer
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Turn off the old monitor, Turn on
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Bios, Sound signal of a bios computer
★★★★★