Virtually all electronics these days use switched-mode power supplies/chargers. I presume that your desktop computer has a metal case and typically desktop pow

Virtually all electronics these days use switched-mode power supplies/chargers. I presume that your desktop computer has a metal case and typically desktop power supplies also have their own metal case. So if the desktop doesn't bother you, then it suggests that the double Faraday cage effect is working for you. It would appear that you are either reacting to the super-audio whine of switched-mode chargers or possibly even the high frequency EMF radiation. Both sources are known to cause distress in some persons. Personally, I sleep far better by not having any electronics in the bedroom and even switch-off power outlets near the bed. In the days of CRTs I used to be bothered by screen flicker. I could only tolerate Sun workstation monitors and some high-end Sony screens - all running at 75+Hz refresh rates.