I hear the hum also, at night and during the day it drives me mad, went to my parents to stay thinking it a noise in my house but nope the hum is present at my parents house much to my dismay of hope of a peaceful undisturbed nights sleep. Had thought it perhaps distant traffic noise at my own house, but hearing the noise at my parents house who live in the middle of nowhere well away from traffic means the hum isn't traffic related. It drives me nuts, have tried wearing ear plugs but they seem to make the hum increase. The only way to remove the hum is with TV noise or listening to music with earphones in as I fall asleep, but earphones make it very difficult and uncomfortable to actually fall asleep. I want to escape this noisy world. Before anyone suggests I may be suffering from tinitus hence hearing that hum, I'm not. Have had my hearing tested for it, and hear no noises when put my fingers in my ears. The hum I can almost feel. Also just before I nod off to sleep I make involuntary low grunts, almost sound like a low growl, I'm not asleep as well aware of my breathing and the noise I make which then makes me sit up. Was in a coma last January intubated orally not nasally and wonder if it's related to possible damage to my throat. It sometimes feels as if I've stopped breathing. Had to come here after finding a post about grunting before falling asleep as found no answer elsewhere or similar events happening elsewhere. Had to cheat to join and tick I'm 50 out of desperation to reply to you. I'm 44 so not far off 50, and I hope this isn't banned from being posted due to me not being 50 as requested when joining this group. I've really had enough of the hum and these low grunts that bring me to full alertness. The grunts can happen even when just very relaxed lying down with head propped up on 3 pillows reading a book or playing a game on my mobile before starting to drift off. I do have brittle asthma, maybe my breathing is being cut off somehow. My coma was so peaceful filled with wonderful dreams that I long to go back into it never to wake again. Incidentally was aware of distant far far away voices in my coma and was aware of my face and hair being touched. Upon waking from coma was able to recite what had been said to me without being asked/prompted/questioned. I asked off my own back if the words had been said to me, very distinct words and if my memory of my hair and face being touched were correct along with the words that went with it. My mum confirmed all of it. She never asked if I could recall any of it, I asked her if she had said/done. That hum wasn't present in my coma thank god, hence me longing to go back into it for such deep peaceful quiet sleep.