bmphoto
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Infra Sound
Only recently have i been interested in this form of paranormal investigating. for those who dont know much about it, it is very low level sound waves, vertually in audible, but when present they can cause you to feel un easy & in extreme cirumstances make you feel that there is a paranormal presence. I watched a documentary recently about Infrasound documented in the LOndon Underground. If you look on the web, there are even websites dedicated to building your own infra sound recorder.
Could people please come forward towards their views & experiences regarding this form of Paranormal Investigating & if they have managed to build their own device & if they have had any sort of success with it.
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Simon Deacon
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15/Nov/2007, 6:25 pm
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Griffydam
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Re: Infra Sound
Infrasound is something i am currently examing in the workplace as some of our equipment produces sound waves, which distress people.
Some people can hear the sound of bats flying by others cannot!
We only see part of the spectrum but with modern camcorders we see the infrared, which is normally invisible to us.
Why should sound be any different!
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15/Nov/2007, 7:25 pm
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KuangEleven
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Re: Infra Sound
You might want to have a read of this link - there's some interesting history there, but it's written for effect and I can't vouch for the accuracy:
http://www.borderlands.com/archives/arch/gavreaus.htm
I've been on an investigation before where we tracked the symptoms down to a loose air conditioning / ventilation duct. We couldn't measure for inrasound through not having sensitive enough kit, but pushing the inspection panel closed and holding it noticeably lightened the atmosphere. We think that the gap was effectively creating a tuned resonance chamber that was causing the duct to vibrate in the infrasound range, hence the uneasiness and dodgy stomachs 
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16/Nov/2007, 3:59 pm
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bmphoto
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Re: Infra Sound
Thanks for that KuangEleven. I will have a look at that website. It does facinate me. I know it is not a new field in Paranormal Investigations, but think that it is one i will definately keep in mind when conducting future investigations.
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Simon Deacon
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16/Nov/2007, 9:30 pm
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SPIRichard
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Re: Infra Sound
I think that as far as experiments in investigations go people stick to what they know. As not many people know alot about infra-sound they may be too afraid to try it out and it may not even cross the minds of most investigators.
There is not a single piece of equipment used that was designed specificaly for detecting ghosts, but someone somewhere tired it out and got interesting results with it.
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23/Nov/2007, 4:33 pm
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bmphoto
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Re: Infra Sound
sometimes it is what an individual does that makes them stand out from all the others. Just because one group doesnt use it, doesnt mean that another shouldnt use it, besides Infra Sound in paranormal investigations should wet your taste buds being a sceptic because it is used to dismiss possiblities of paranormal existance.
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Simon Deacon
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23/Nov/2007, 8:11 pm
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bmphoto
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Re: Infra Sound
I have just been researching Infrasound a little further & came accross a very interesting document that has been wrote by NASA indicating that the eye resonates when soundwaves reach 18htz & this can cause the eye to see what could be explained as ghostly shaddows in the corner of the eye.
Another documentation refering to this is by the late Vic Tandy, a lecturer at Coventry University, suggested that the frequency 19 hertz was responsible for many ghost sightings. He was working late one night alone in a supposedly haunted laboratory at Warwick, when he felt very anxious, and could detect a grey blob out of the corner of his eye. When he turned to face it, there was nothing.
The following day, he was working on his fencing foil, with the handle held in a vice. Although there was nothing touching it, it started to vibrate wildly. Further investigation led him to discover that the extraction fan was emitting a frequency of 18.98 Hz, very close to the resonant frequency of the eye (given as 18 Hz in NASA Technical Report 19770013810). This was why he saw a ghostly figure — it was an optical illusion caused by his eyeballs resonating. The room was exactly half a wavelength in length, and the desk was in the centre, thus causing a standing wave which was detected by the foil.
Further research shown that the human body iseffected by resonation wves anything below 20htz & diferent parts of the body are effected according to the frequency emitted.
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Simon Deacon
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19/Dec/2007, 7:38 pm
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bmphoto
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Re: Infra Sound
I was watching a programme on TV the other day, some of you might of heard about it. Brainiacs, science abuse. They were testing to see what variants of sound waves travel the greatest distance without degrading. One team were based in England & the other were on the French coastline, a distance of approximately 26 miles.
1. High explosives – Ground level. Upon detonation, there was no sound wave received by the French team.
2. High explosive – mid air. Again the sound wave was measured in England & in France, but there was no reception by the French team for a second time.
3. The third experiment was to use low-level sound waves. A set of speakers were set up emitting a 50db sound wave, much similar to that, that paranormal investigators associate to the infrasound waves. The sound was visible as a mannequin was put in front of the speakers & was vibrating all over the place from the vibrations caused by the sound waves being emitted by these huge speakers. This time the French team did receive the signal from England, though the sound wave was not audible, they were able to pick it up via a specialised machine & the wave machine detected that even though the sound wave had traversed this great distance it hardly shown signs of degradation. It took 44 seconds for the wave to traverse the 26 miles.
The conclusion to this experiment was that low-level sound waves could travel vast distances without degradation, unlike high-level sound waves. In the paranormal field, this could mean that some people could be affected by low-level sound waves that could be emitting from much greater distances than first thought. People could be being effected by sound waves being emitted not from just within the location, what could be theoretically miles away. I know that factories that operate industrial machinery that could emit these waves, take precautionary measures to reduce the effect on local residential areas. I would like to investigate what sort of items we use on a daily basis that could emit these low level frequencies, what level they emit & how far they can travel. It would be interesting to map out reported paranormal locations to see what commercial properties reside within or around their communities & what level of sound waves are documented at each.
I am by no means saying that infrasound is an answer to all reported paranormal activity, but could well be the answer to many so called hauntings.
Last edited by bmphoto, 2/Feb/2008, 11:35 pm
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Simon Deacon
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2/Feb/2008, 11:34 pm
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KuangEleven
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Re: Infra Sound
It's a bit simpler than one particular sound. The human range of hearing is typically given as 20hz to 20khz, but that's a very generic range and typically only applies to people between 2 and 20. From birth your brain trains your ear to hear (there are twice as many nerves going brain > ear as the other way, believe it or not) so that it becomes accustomed to the sounds most likely to be helpful, and after your teens your range starts to decline.
You'll find that the upper frequencies are the first to fade, so by the age of 30 the highest frequency you can hear may be 18khz, and five years after that it'll be 17khz etc. This means that extremely high pitched sounds fall out of your hearing range, and that's the basis behind the 'mosquito' style crowd control devices aimed at teenagers.
Your hearing actually does a small version of this each day as a result of exposure to noise. If you're recording music, for example, you should always wait until the next morning to mix it because otherwise you'll find that you've put too much treble in to compensate for high frequency loss throughout the day. The strongest extent of this most people will experience will be when they've been to a very loud concert, and when they come out they can only hear low muffled sounds and a kind of 'bubbling' in the background, plus usually some tinnitus. This is your ear losing most of its ability to hear high pitched sounds.
Now consider than in the context of listening for sounds in the early hours of the morning on vigils.. 
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19/Jan/2009, 10:47 pm
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