I've had these LF hums for years but lately it's been worse.
I thought at one stage it was the local motorway (about 1 mile off) tuned to house freq- as closing windows, moving round house seemed to affect it. This time though I got up and started switching off mains services round the house...then I found just the click if the switch (either on or off) would sometimes stop the hum for a few seconds.Even moving my head slightly would detune the sound before it returned. tapping skull also has an effect.
As a bit of a conspiracy freak...I tended to go that way and consider Haarp,HV lines and world size effects at the earths' natural freq- around 8Hz(inaudible)...but could cross modulate in unknown ways.
it's a very tricky problem.
I have HF tinnitus (continual 'singing') but that is not intrusive in the same way as the L.F -especially as 'that' stops and starts all night long.
The last time I got up at 4am to mail someone in the UK about the problem and went back to bed...it stopped for 2 weeks.(see conspiracy above
This person later said in his opinion it was due to toxic build up in the inner ear...but I can find no link on-line to this.He also said exercise could stop the effects.
My hearing is pretty good apart from machinery induced roll off of response.
I was in industry for many years...loads of machinery noise,HV, magnetic fields etc. and never been highly susceptible to problems.
Nevertheless- this is a very irritating syndrome and I will be doing more research on it. I hope this board will furnish some ideas!
My opinion at this stage is that I have hyper sensitivity to picking up external LF and induced noise...but that it is not ALL me...and there are many theoretical paths to pursue...but with some difficulties expected.
I don't necessarily expect to nail it down..but looking will be 'fun'..well- better than just lying down on the subject
I suspect I will either run out of physical space (ground waves are rather long) or money for the equipment list !!
Good luck all you sufferers..you're not alone- or going mad...that's something!