I do feel for you. It is one of the worse conditions. I assume you have tried all sorts to block out the noise? Sometimes blocking the ears works, or ear drops for wax - the best kind are expensive, but may be worth it. It usually starts when the brain starts concentrating on the noise, and then cannot rid the mind of it.
The body's balance mechanism is in the ear, so you must also suffer from vertigo now and then?
There is a constant 'humming noise in my area. I am assured that the same humming noise is in many areas around the country. It is like some sort of machinery left on. No one seems to be able to account for it. Apparently it is in the atmosphere and could be anything, at least that was what was on google before Ai.
I didn't know anything about babies and white noise until I clicked on the mumsnet bargarn email. I was horrified that anyone could even subject a baby to a continuous noise, yet alone invent and sell something like that.
The most serious side of this is that the baby may have something wrong physically if he/she cannot sleep. I have heard of recordings of mothers' heartbeat for the new born, which I think is acceptable.
Also, if a baby cannot rest or sleep and is irritable, the mother should pick the baby up, especially if it could be that the baby needs comfort. Sometimes we do not ascribe to babies something we long for ourselves - a cuddle.
I take great pains to ignore any continuous noise , because I believe if you can block it out, you will not develop tinnitus, which is an awful thing to have.