Anyone else ever experience electrical dropouts?

Whats going on here? I noticed about a year ago that my signal would drop out when I would walk across a particular part of my listening room. I sold my last rig and was not listening to music for awhile. I rebuilt my rig and now my dropouts are worse. My signal will drop now if I'm in the adjoing room walking around, if I open or close my closet doors, if someone turns a light on or off downstairs and if someone opens or closes the garage door. I know I'll probably have to call an electrician in order to fix this, but any ideas whats going on here? Is it possibly a problem with the electrical panels ground? This is pretty dang frustrating...