Many power supplis for electronics, especially laptops, emit a veey high pitched noise. While for the most part this soind is too quiet to bother anyone it can sometimes become obnoxious.
The simple solution is to unplug it, but if you need to be using the system for an extended period it needs to be plugged in.
Is there anything that can be done to reduce the noise? I thought of insulating it somehow, but anything that could block the noise seems like a potential heat dispersal problem. Not to mention that the sounnd seems to penetrate anything I have tried to cover it with.