I have a timer set on my mac that plays 5 high bell sounds for about 5 seconds. But i feel as if the 5 single bells that ring when the alarm goes off, will not be enough to wake me up. Do i need a constant noise like the sound file you provided that gets progressively louder, or can 5 constant high pitched bell sounds be enough on my computer to wake me up?

Thanks. I am going to try this tonight