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Originally posted by Eisum
Hello all,
I thought his might be of some interest to you.
On the 19th of October, 2 Russian Tu-95MS Bears where intercepted above the North Sea by 2 F16's after being followed by British and Danish aircraft's.
Apparently these Bears are known for being very noisy...
Link below(in dutch)
www.endandit.nl...
Old times revived today. Two Russian Tu-95MS Bear aircraft were spotted over the North Sea, where two F-16s went off at the airbase Leeuwarden. The Bears had previously been followed by Danish and British jets. Eventually the bear went home and turned the rest over the North Sea again. Because the Bears make a pokkeherrie. Besides the four Kuznetsov noisy turbine engines of 14,795 horsepower each, making the adjustable counter rotating propellers, a lot of noise. So many, that NATO pilots intercepting the bears sometimes hear. Like the American B52, a contemporary, the Tu-95 Bear (Tu-142 and derivatives) have not yet retired, and about sixty from the Russians remain in operational use as a muli-role bomber (Tu-plus sixteen 142 for their Naval Aviation).
When successive layers of air have different temperatures, the ability of sound to travel faster in warm air than in cold air causes bending of sound. This bending of sound is called refraction.
On a warm day, the air near the ground is warmer than the air above and so the speed of sound waves near the ground is higher. This causes the bending of the sound away from the ground. On a cold day or at night, the reverse happens and the sound waves bend towards the earth. Thus on a cold day sounds can be heard over longer distances.
Sounds can be heard at abnormally long distances over water on quiet days. This happens because air next to water is cooler than air above and, therefore, sound waves bend towards the water and can travel long distances
Originally posted by pauljs75
This is for the OP: How far are you from the wind farms? (I know there's a couple just south of Rockford off of I-39.) Under certain weather conditions (like low level wind shear) the turbines can start making different kind of noises. Other conditions (but less likely) such as overspeed can also cause cavitation that supposedly sounds like a helicopter.
YouTube seems to have a couple vids of the first kind, and perhaps just one of the second. But I haven't found any where the audio is sufficiently clear enough to be worth linking to. (Too much wind noise in the mic or audio isn't that great to begin with.) Yet you may want to search "wind turbine noise" there and see if any sound comparable.
I know during certain quiet periods at night, I can hear trains from 15 to 20 mi away. If for some reason a wind farm is making noise under similar conditions, I wouldn't be too surprised if the sound carries from that as well.
Despite such problems, I'm still pro-wind power. It's one of the cleanest energy resources we've got. I'm just mentioning that it may be a more-everyday and mundane cause of the sound than other theories.
Originally posted by favouriteslave
I think I've found it! It happened to me again this past Sunday. The dog detected it first and started howling in pain, then came the sound which didn't last for very long maybe 30 seconds this time. Since then I've been "sick in my head" Not a headache but like my brain is turned to vibrate and it won't stop. It hurts and feels like my head is detached from me. I've been completely nauseated all day, I've had to lay down. It has not gone away.
www.subversiveelement.com...
Google the TAOS HUM, there is much more info that what is on this page!
Originally posted by 2ndSEED
Originally posted by favouriteslave
I think I've found it! It happened to me again this past Sunday. The dog detected it first and started howling in pain, then came the sound which didn't last for very long maybe 30 seconds this time. Since then I've been "sick in my head" Not a headache but like my brain is turned to vibrate and it won't stop. It hurts and feels like my head is detached from me. I've been completely nauseated all day, I've had to lay down. It has not gone away.
www.subversiveelement.com...
Google the TAOS HUM, there is much more info that what is on this page!
Just did some online search for (TAOS HUM) wow theres alot of refrence online regarding it, will do more indepth research to see if this TAO HUM and what I herd are related.... Sorry about your head aches!!!