Did you try over the ear rifle range hearing protectors like the airline runway workers use or in the ear ear buds designed to block out sounds yet? Both of those seem to block the hum. You can connect an iPod to the in the ear noise blocking ear buds and listen to music too, which can help you sleep. My iPod Touch also has an alarm built in, so if you fall asleep you can set it like an alarm clock.
I have been trying to determine if its a physiological problem or an actual hum from some machine or other source. Since you have also determined its 58 Hz and you are in a country with 50 Hz AC power it opens up the possibility it is a natural phenomenon. Since the over the ear or in the ear sound blocking method works for me, I am leaning toward an exterior source. I don't notice it at work but there is a massive HVAC plant on the roof and the noise from it and the ductwork may mask it. I have to search around for a more quiet building here to test that theory. I have noticed in my brick home where I notice the hum mostly, that when the geothermal heat pump comes on, it seems to mask or destructively interfere with the hum so its no longer noticed. The house is very quiet being in the woods but it is surrounded by water, one side has a large canal where huge ships go by sometimes and on the other side a big bay with some sort of factories on the far side that could be making some noise. I can hear the big ships coming from miles away, just a faint low frequency noise close to the hum, but it gets louder and than goes away while the hum is constant and is still heard. If it is a real noise causing the hum it does not act like a normal noise as moving to different parts of the home or to the basement has no change in the hum I hear. If it was a real noise, you should notice constructive and destructive changes in the amplitude as you move around, that does not happen with the hum. I am leaning to the inner ear somehow resonating itself and the trigger could be some natural or artificial low frequency sound. Why using noise blocking ear covers makes it stop I can not figure out. For instance I have noise canceling over the ear headphones (like the Bose ones), that are quiet effective in blocking low frequency sounds but they do not block the hum. So that makes no sense. They do not create pressure seal over the ear like the rifle protectors and in the ear buds do, so it seems to be an external source, but the Bose headphones should destructively reduce any outside hum, as they block boom boom car stereo noise very well. So it is making more sense something is causing the inner ear to resonate. I am also looking for chemical or diet causes that could be causing it. So far I have eliminated the following from causing the hum for me: alcohol, no effect if abstain for weeks. aspirin, no effect if stop using it for weeks. NutraSweet, seems to have no effect, but it does cause headaches for me. Things that make it worse or more noticeable: Stress and lack of sleep. I think its worse if you are dehydrated. Being indoors vs outdoors, I have to work on that as most outdoor locations are too noisy to determine if the hum is there. Keep me posted on your findings, we need to get a team of scientists involved in this to determine if there is any world wide external source of this hum or if the inner ear can somehow resonate and what triggers it. BTW, I had my hearing tested and it beyond perfect normal. So there is noting unusual in my hearing, except its too good maybe. -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hum-sufferers?hl=en.
