Both my self and my wife hear the hum and it is absolutely debilitating to her and has been for over a year. I actually just started experiencing this recently but it is absolutely a real sensation caused by something external. I managed to catch it on video in my house. I am in search of some way to find relief for my wife she suffers from this majorly and it has cost her almost every thing at this point. Her quality of life is almost 0 she cannot work or drive or anything that people have to do on a daily basis. So you can imagine that it is going to cost us our home very soon because we have lost about half of our income. She was the lead x ray tech in a trauma center er. For about 18 years. Until she was debilitated and tortured every day by this hum that she lost her job and now we are very close to losing our home along with our vehicles. Because it all happened so fast I didn't know who to turn to. At first I actually almost had her committed over this. But later on I would start hearing and feeling it myself. It presents itself along with intense pressure in the brain almost like a squeezing sensation and I had what I believe to be heart palpitations because of it. It is very intense. And it's like this all of the time for her with little to no relief she has actually mentioned suicide to try to escape it. I feel so helpless . I worry that no one will ever find a source or a remedy. I worry for my kids. This has cost them their second opportunity at having a mother. Their first mother passed away so I met this amazing woman that loved my children and then this happens. I'm so sorry for my children I don't know what to do.. Thanks for any one that took the time to read this. And God Bless