Telephone busy signal No answer, try again. Oh wait, do you think this sound would wake you up in the morning? :p mp3 m4r ogg
Robot can't believe his eyes The surpsised exclamation of a robot who just can't believe what it's seeing. mp3 m4r ogg
Do not press this button A pretty harsh, grating noise, like the sound of a not-so-friendly machine warning you to keep your distance. mp3 m4r ogg
Dogged The sonic embodiment of determination. A persistent, dogged sound, refusing to be ignored. mp3 m4r ogg
Attention required A commanding alarm sound, signaling an urgent need for attention, impossible to ignore. mp3 m4r ogg