Office work, general noise:
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Closing the laptop cover, Opening
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Fan noise, Turning on the computer, shutting
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Franking machine
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Jet printer
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Typewriter, environmental sounds, Office work
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Input error sound, Pressing a keypad
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Manual copy machine
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Read, room noise, write, Hard disk
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Repeatedly pressing a computer mouse
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Turn off the old monitor, Turn on
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Computer interface, alarm
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Old computer keyboard
★★★★★