From: David Rudiak <drudiak.nul> Date: Mon, 30 Jan 2012 14:46:31 -0800 Archived: Mon, 30 Jan 2012 16:53:34 -0500 Subject: Re: Those "Noises" And MSM >From: William Treurniet <wtreurniet.nul> >To: post.nul >Date: Sun, 29 Jan 2012 22:25:30 -0500 >Subject: Re: Those "Noises" And MSM >>From: David Rudiak<drudiak.nul> >>To: post.nul >>Date: Fri, 27 Jan 2012 09:43:35 -0800 >>Subject: Re: Those "Noises" And MSM >><snip> >>Before everybody wigs out and attributes such sounds to >>'paranormal' origins or secret guvmint project, the most likely >>reason for such mysterious sounds is a heat inversion layer, >>i.e., air temperature gets warmer as one goes up from ground >>level. These are more common in winter. >>Temperature inversions can cause sounds to be heard at much >>greater distances than normal, the sound equivalent of optical >>mirages. Thus somebody might ordinarily be too far from an >>airport or busy freeway or thunderstorm to hear the sounds, but >>if conditions are right, the sounds can be reflected off higher, >>warmer air layers back to the ground and be heard many miles >>away. <snip> >>Because such inversion layers are usually not the norm, people >>start hearing sounds they ordinarily would not and are often >>mystified or weirded out by them. >Most of the recordings being looked at now are of low-frequency >sounds, with the largest spectral peak typically in the >neighborhood of 200-250 Hz. Perhaps the sound of a jet engine >would be approximately in that area, especially with higher >frequencies filtered out by that great a distance. But I would >say the recordings do not sound like a jet engine. There could >be other sources, but they would need to be as loud as a jet >engine (~140 dB at 50 m) to carry a significant distance. >There was a recording made in June, 2010, that is definitely not >of an aircraft engine. The sound lasted about 5 min and occurred >twice about a 1/2 hour apart. Like much that we are discussing, >the video could have been dubbed, but I don't see anything to >suggest that in this case. >http://tinyurl.com/7ejtnvh >This sound was more complex with the loudest spectral peak at >3200 Hz. A number of other peaks were below 1000 Hz but these >lower frequencies were less audible. The source was said to be >impossible to localize but seemed to come from the sky. It was >'super loud' and was so annoying that people in the neighborhood >applauded when it stopped. >I would point out that higher frequency sounds are hard to >localize even under optimal conditions. And because its >frequency was so high, the source must have had a very large >power if it was far away. Another thought about possible source comes to mind. The sun is currently emitting large solar flares, the particles of which first hit Earth Jan. 21/22. This will be generating large currents in the upper atmosphere resulting in very active auroras, which are also known to cause sounds given the proper conditions (electrophonic sound). The same can happen with large meteor fireballs. Usually the sounds are described as higher frequency hissing, sizzling, or rustling, but there are also some very low frequency sounds generated which might be felt or heard as a rumbling. The subject is still pretty controversial as to what exactly is creating the sounds, often attributed (as in the case of UFOs) to overactive imaginations. However, they have been recorded in the field and are now generally thought to be due to electro- magnetic transduction into sound by something nearby acting as an antenna, which could be power lines, metal fence, eyeglasses, vegetation that conducts well, or anything else. David Rudiak Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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