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Re: [SpectrumLabUsers] The Hum (was RTL2832u wideband dongle)

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  • Facility 406 DM09
    The forum is useful as a sounding board of ideas and data collection where identifable locations are. As with everything, take everythig with caution I
    Message 1 of 16 , Jul 30 7:36 PM
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      "The forum is useful as a sounding board of ideas and data collection where
      identifable locations are. As with everything, take everythig with caution"

      I found quite the opposite there over a several year period. No real
      research, no interest in real research, lots of speculation, dismissal of
      all suggestions that could eliminate or verify a source, even if it was
      something as simple as putting your ear to an electric clock, gas pipe or
      power pole in the back yard, nope, FAR to difficult... I found it more of a
      group of whiners with no real interest in "the hum". Maybe things changed?

      Kurt
    • Facility 406 DM09
      ... Yes, both a printout and an archived screen capture from a VLF station in Italy. In my instance, after having heard it since the late 1980 s and checking
      Message 2 of 16 , Jul 30 10:27 PM
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        : Do you still have that, Kurt? Where was the apparent source?

        Yes, both a printout and an archived screen capture from a VLF station in
        Italy.

        In my instance, after having heard it since the late 1980's and checking
        literally thousands of sources across some 2/3 of the US, suffering the
        sleepless nights, the migraines, et cetera, et cetera... One evening while
        sitting at the desk I began to hear it. It was more annoying than usual. I
        became dizzy and sick to my stomach. It appeared to me that the walls were
        physically shaking, yet others in the house didn't notice, even those
        standing next to me. There was an atomic clock on the wall in front of me
        and I began to note the time with fluctuations in the hum. As it got worse
        and I thought I would vomit, suddenly it stopped. It was as though someone
        flipped a switch. Dead silence. I sat for a few moments and could feel the
        stress drain away. Perhaps ten minutes later I heard it again and thought
        to myself, "Oh, NO!". It was present, but faint.

        While in the shower the next morning, I had an idea. Since I didn't have
        anything set up to monitor ULF or ELF at that time, I posted a request to a
        group asking for screen captures from the time and date noted. I did not
        mention what I was looking for, only that I wanted to verify something
        detected.

        I received a screen capture from Renato Romero which included several
        Schumann Resonance's. I glanced across the time stamps to the times I heard
        "the hum".

        SR1 could be seen to increase over several minutes, fluctuate a bit,
        increase 200-300% across the time I thought I would puke, then, suddenly, as
        though the system had been disconnected, stop entirely. This dead spot in
        SR1 lasted several minutes, then slowly began to fade in and continue very
        much diminished, precisely as I had heard/felt and noted.

        That clinched it for me, a moment by moment visual indication of what I
        heard and felt- recorded by an independent party on the other side of the
        planet and provided a day or two after the fact.

        Since then, I am aware of the hum, but only notice it a few moments, maybe a
        minute every month or two. It seems it's only a annoyance I focused on when
        it was an unknown.

        This does not rule out other hums people hear. My Dad used to hear a hum in
        his bedroom, especially in the closet. A quick check indicated that the
        power drop for the house was attached to that wall and there was a humming
        transformer on the pole, the sound was tranfered down the power drop to the
        closet wall.

        When I was little I used to hear a hum in the bedroom, it was from a Lloyds
        electric clock on Dads dresser.

        We have many gas pipes here, big ones, little ones, low pressure and high
        pressure, I've never detected a hum associated with them. We do get a hum
        in the house from time to time, but it's from our water pump. There is a
        power pole about 700' from the house, it hums, even buzzes sometimes, turns
        out that even though there is no detectable breeze at ground level, 30' up
        there is just enough to get the wires to vibrate and make the pole hum.

        Finding the hum is not about assigning an arbitray cause to it, such as gas
        pipes, since the hum is heard everywhere and gas pipes are everywhere, so
        that must be the cause, same with water pipes, sewer lines, even power lines
        in cities and rurla areas, but ruling things out, which is FAR easier. You
        hear a hum, listen to a pole, different sound, ruled out, on to the next
        suspected item.

        SR1 makes sense for me. I've heard a hum a long time, the SR has been there
        a long time. I hear the hum in areas with no commercial infrastructure or
        any industry, but the hum is still there. So is the SR. The hum was
        mentioned hundreds of years ago, the SR was there, but nothing we blame it
        on now. When explorers asked the indigenous peoples about it, they said it
        had always been there, which relatively speaking could be hundreds, even
        thousands of years or more, depending on how much they paid attention to it
        and talked about it in their stories. That rules out everything you can
        ever imagine, except that whole SR thing, it's been around as long as we've
        had an atmosphere.

        Kurt
      • Steve Kohlhase
        Kurt   Not neccessarily different, but heres why I participate;    I am an Mechanical Engineer trying to raise attention to the gov t agencies I beleive in
        Message 3 of 16 , Jul 31 5:07 AM
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          Kurt
           
          Not neccessarily different, but heres why I participate; 
           
          I am an Mechanical Engineer trying to raise attention to the gov't agencies I beleive in direct control of an industry that for us here in Tri State CT/NY/NJ , is the source generating ILFN/ LFN surface Rayleigh waves inducing in dwelling, in vehicle hum and vibrations.  I have put in over 3000 hours observing, researching and performing field testing  (albeit with more a qualitative value than quantitative) to what was a hunch at the start of the hum , has proven otherwise, and far more reaching and encompassing.  
           
          Through process of elimination (including data and findings from 2 reputible acoustic testing consultants) I have done extensive testing using the same methods as the consultants of 1/3 octave analysis and on my own also using FFT and Spectrum Lab . It is conclusive here, the hum is being caused by major additions/ modifications to two High Pressure (800 psig- 1400psig) Natural Gas Transmission company systems at 5 new or modified natural gas mainline compressor stations in the state. Adding tens of thousands of horse power in 2008 systems and other changes foilwed shortly after they went into service, the HUM.  Field testing along these systems on the right of ways as well as many miles perpendicually away (triangulated, scatter diagram) verifies the expected results. The epicenter of the linear/planar type source pipelines and attentuaion absolutely fit the hypothesis.  And the only way to get this is using tools, the human hear is useless for this work other than confirming in the characteristicss of the hum and its presense at the location being tested (car used as a mobile acosutics lab).  This phenomena is not like most can understand.  You just can't listen and hear this stuff without something to reasonate at natural frequency.  It's comlex and needs to be seriously investigated and exposed and fixed.
           
          So I tell you this because the blogs and forums like the yahoo forum are full of location data and experieinces needed to pull a nationwide research effort together and  are the only place to collect data like this.  As long as the report seems to have some validity and meets the defintion of low frequency, idling deisel engine, vibrations of floors, almost only heard inside a dwelling, ill feelings, etc do they get logged.  98% batting average so far on pipeline conclusion.    
           
          I tried to attach a map of the locations in the USA over laid on the major pipeline systems, but won't upload.  It is in teh yahoo hum forum files section though, sorry.
           
          Anyway, again if someone on the forum starts to do work on this, please contact me so we can exchange notes
           
          Steve 

          From: Facility 406 DM09 <facility_406@...>
          To: SpectrumLabUsers@yahoogroups.com
          Sent: Monday, July 30, 2012 10:36 PM
          Subject: Re: [SpectrumLabUsers] The Hum (was RTL2832u wideband dongle)

           
          "The forum is useful as a sounding board of ideas and data collection where
          identifable locations are. As with everything, take everythig with caution"

          I found quite the opposite there over a several year period. No real
          research, no interest in real research, lots of speculation, dismissal of
          all suggestions that could eliminate or verify a source, even if it was
          something as simple as putting your ear to an electric clock, gas pipe or
          power pole in the back yard, nope, FAR to difficult... I found it more of a
          group of whiners with no real interest in "the hum". Maybe things changed?

          Kurt



        • wolf_dl4yhf
          Hello Bill, ... You may want to check out the very last beta , Spectrum Lab V2.78 b11. There is (marginal..) support for Winrad-compatible ExtIO-DLLs in SL
          Message 4 of 16 , Aug 24, 2012
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            Hello Bill,

            You asked:

            > Has anyone attempted to interface the RTL2832u dongle to SL?


            You may want to check out the very last "beta", Spectrum Lab V2.78 b11.
            There is (marginal..) support for Winrad-compatible ExtIO-DLLs in SL
            now. If there is a suitable interface DLL (ExtIO_something.DLL) forthe
            RTL2832-dongle somewhere, it may work with SL.
            So far, I only tested the ExtIO-DLL-host with an SDR-IQ and a Perseus,
            and in addition the new feature was tested with a QS1R .

            As usual, the latest 'beta' is here:

            http://dl4yhf.ssl7.com/speclab/install_speclab_beta.zip

            (Beware: it may, and at the moment does, contain a couple of bugs. The
            ExtIO-DLL must provide an I/Q-stream to the application. ExtIO-DLLs
            which require a soundcard to stream in the audio are not supported yet,
            but this may change if there is a demand for it).

            How to select a Winrad-compatible ExtIO-DLL for input in Spectrum Lab is
            described here:

            http://www.qsl.net/dl4yhf/speclab/settings.htm#ext_io_dll


            All the best, and special greetings to the members who moved here from
            the 'old' group,

            Wolfgang "Wolf" DL4YHF .
          • William Dionne
            Wolf, This is indeed good news. I know this dongle has marginal performance for many applications but to have a tunable bandwidth of nearly 2 GHz and an
            Message 5 of 16 , Aug 24, 2012
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              Wolf,  This is indeed good news.  I know this dongle has marginal performance for many applications but to have a tunable bandwidth of nearly 2 GHz and an instantaneous bandwidth of 2 MHz this device deserves investigating in the true spirit of amateur radio.  

              Thanks again,

              Bill
              N4DM  

              > To: SpectrumLabUsers@yahoogroups.com
              > From: dl4yhf@...
              > Date: Fri, 24 Aug 2012 14:18:56 +0200
              > Subject: [SpectrumLabUsers] Re: RTL2832u wideband dongle
              >
              > Hello Bill,
              >
              > You asked:
              >
              > > Has anyone attempted to interface the RTL2832u dongle to SL?
              >
              >
              > You may want to check out the very last "beta", Spectrum Lab V2.78 b11.
              > There is (marginal..) support for Winrad-compatible ExtIO-DLLs in SL
              > now. If there is a suitable interface DLL (ExtIO_something.DLL) forthe
              > RTL2832-dongle somewhere, it may work with SL.
              > So far, I only tested the ExtIO-DLL-host with an SDR-IQ and a Perseus,
              > and in addition the new feature was tested with a QS1R .
              >
              > As usual, the latest 'beta' is here:
              >
              > http://dl4yhf.ssl7.com/speclab/install_speclab_beta.zip
              >
              > (Beware: it may, and at the moment does, contain a couple of bugs. The
              > ExtIO-DLL must provide an I/Q-stream to the application. ExtIO-DLLs
              > which require a soundcard to stream in the audio are not supported yet,
              > but this may change if there is a demand for it).
              >
              > How to select a Winrad-compatible ExtIO-DLL for input in Spectrum Lab is
              > described here:
              >
              > http://www.qsl.net/dl4yhf/speclab/settings.htm#ext_io_dll
              >
              >
              > All the best, and special greetings to the members who moved here from
              > the 'old' group,
              >
              > Wolfgang "Wolf" DL4YHF .
              >
              >
              >
              > ------------------------------------
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