A lot of work done SS ! >From what you say this is inaudible version of Hum- but one you can detect in other ways. My PC shows such frequencies on open circuit input- but it could be noise. I just don't know what sort -at such low Frqs. They are the same freq region as Schumann resonance of the earths mag field. A good pickup for airborne LF is a large woofer with a slack cone and in a vented, (not closed port), enclosure. Feed that through to your pc sound input card and see if it tallies with your detected events when you scan using Spectrogram -FFT free prog on Input analysis. If you're not used to using this approach can you find an Eng or Tech to help? The vibes you pick up from towers are not direct transmits but more likely to be a cross modulation of channel switching of UHF signals , like our Tetra in UK, ( not used in TV afaik), or power imbalances in the earth returns of heavy duty supplies, at a guess. Without being there, it's hard to gauge and would need substantial equipment to register, but it does seem like you have repeatable results and should be of interest to your Public Health Office. I know they are notoriously fey at getting involved in this line of work, by many reports- as it cuts across a lot of Commercial and Gov't interests. If you are suffering physical pain/discomfort, they can hardly refuse to take an interest.
The other thing to note- is that ELF (and LF) are notorious in their lack of directional positioning by ear and will play tricks, especially if standing waves are involved, which is quite likely. Water/Gas pipes and Power supply leakages (50~60Hz) have been suspects before in hum discussions.. On Sep 2, 7:41 am, Sandstorm <[email protected]> wrote: > This is a list of all the measurements I have made in Brandon FL, the > "evidence" points strongly to the TV towers in Riverview. I believe > that something changed there in early August there to create all of > this awful mind-rattling low frequency noise. > > Jolted awake (AGAIN) Aug 31, 2009 at 2:20 AM, so I jumped out of bed > to do some more readings. Whoopee. > I was barely asleep anyway, since it rumbles most of the day/night > when I am home, and hurts my ears a great deal of the time! > After being driven to distraction by this noise/vibration that people > (that cannot perceive it) tell me is not there, > I am trying to catalog all the data I have on it: > > P.S. does anyone know of a relatively inexpensive recorder/microphone > that could capture very low frequencies? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
