When the atmospheric conditions were right in the house I grew up in you could hear a faint rumbling sometimes, a lot like some 'hum' videos. It was the sound of trains about 30 miles away. You knew it was trains because occasionally you'd hear them sound their horns.

Originally posted by Adaleiz
well after reading this thread Id like to call for anyone who had self made videos or video files (or perhaps If you wanna save me some time, just an audio file?) to upload them to mediafire so I can run harmonic spectral analysis on the audio. (in other words, find out what frequencies are in the audio and the DB levels in relative terms) obviously the widest and longest band of color would be the target frequency.. I may even be able to isolate that frequency specifically.
This would no doubt in my mind this will shed some amount of light...on a noise. lol, ironic? I think so.

I can tell you this, It cannot possibly be an infrasonic frequency (for those who know what that is and may have thought it as a theory) for 1) Infrasonic frequencies are ofc able to be picked up by the human ear, however the brain is never given a realization that they're there (unless at moderately high DB levels, in which you would feel a vibration or pounding feeling in your chest as opposed to 'hearing' it.(however id like to note that the vibrating or pounding feeling that you can feel within your body occurs at around 120-140dbs, however this is only in the case that the frequency(s) can be processed/interpreted by the brain. If it were to be an infrasonic sound the db level can be much much lower.)

Secondly is this; (most) Camera's cannot record infrasonic frequencies, and Speaker systems in TVs and computers cannot play back the infrasound component. (most speakers have a much narrower dynamic range output than a humans' dynamic hearing range) and even if it did, you wouldn't hear it. Lets say this is indeed an infrasonic sound (even though my deduction is logical and sound), then only a harmonic spectral analysis would reveal that. the reason I say harmonic is because unlike magnitude(amplitude) spectral analysis, harmonic spectral analysis can estimate the specific frequencies within the audio waveform.


So please, contriboot some sound or video files with the sound.. I'll give you what I can.

just bumping this post so people can contribute their recordings for an analysis

Can someone please get an infared camera pointed at the ski when this noise is on..

see whats out there..

Hello

After much review and thought, i believe that the sounds are emanating from inside the earth. I believe that the molten core is shifting and the sounds being heard is from that. The sounds will be heard coming from the ground or sky from an echo effect.

I believe in time the stresses will mount and there will be major earthquakes that will make records everywhere. Every week there will probably be a massive one with loss of life.

get ready for the end game folks!

Hi
I´ve been reading all the threads about this subject, and personally have heard the type rumbling jet sound while i was spending christmas at my sister´s house at Norwich UK.That sound waked me up at 4 o´clock in the morning I got up went outside to check what was happening and heard that sound and I could not pinpoint the location but the felling was that the sound came from the sky.Next morning i asked my sister about nearby airbases and if she listened that weird sound but she had not.
I work at a recording studio in Oporto, Portugal and made some audio analysis of the videos circulating in youtube
but the majority are of very poor quality to jump to conclusions.
The horn type sounds frequency comes at 138 hz 222hz 592hz and last 88hz give or take.
Sounds like the Et movie scene when trying to communicate using sound although the interval look the same there are missing notes or (frequency).
Last,there are now alot of fake videos circulating but i feel something is about to happen when?
Nobody knows i think.