Hi. Lately my noise sensitivity has become a problem for me, especially around the computer. It seems to be giving off a high pitch (which of course no one else seems to hear). It's not the fan & the computer techie saw nothing wrong with the computer. I'm bothered even when wearing ear plugs. Has any one had any experience with lowering noise levels through sound proofing? I found some sound proofing mats & foam when I searched the internet. Maybe somebody here has had similar problems with vibrations & noise & can offer advice? I'm hopeful... I've controlled the light in the room so my eyes are OK, got a comfy chair for my back & butt, now I need to take care of my ears. Always something.... Best thoughts to all.