Ok - it is late (or early depending on your view point), but I am not hearing things. I have a PowerBook G4 1.67GHz running 10.4. The speaker is muted. When pushing the processor fairly hard, I am getting a series of sounds from the left side that sound like waves crashing ona beach. It lasts for 2 or 3 seconds and starts out loud and then fades.
Is this some sort of RFI pickup from the processor being picked up by the speaker?