So könnte es sich anhören, wenn jemand unerfahrenes auf einer computertastatur tippt und die gebrauchten tasten nicht findet. That's what it might sound like when someone inexperienced is typing on a computer keyboard and can't find the keys they need.
Apple imac is a silent computer. I don't hear almost any noise from it, but i tried giving a microphone-sweep over the screen, which surprised me. You can hear various kinds of noise in a close audition. A dynamic mic.