I did a similar (but much more ugly) project a few years ago, and found that the result was that one could then hear various electrical crackling sounds from in

I did a similar (but much more ugly) project a few years ago, and found that the result was that one could then hear various electrical crackling sounds from inductors transformers and capacitors, especially from the power supply and motherboard. It actually sounded worse than a macbook pro which didn't make as much electrical noise.