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The shapes of buildings, resonance, and the Hum

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Follow World Hum Map and Database Project on WordPress.com

I’ve been poring over the Database recently, looking for patterns. Based on this and the combined experience of other Hum hearers, I am increasingly convinced that the shapes of buildings and their resonance has nothing at all to do with the world-wide Hum. The acoustic properties of individual rooms, however, may affect what a hearer perceives.

For those of us who are convinced that the shape of a building plays a significant role in the Hum, then perhaps try this experiment: wait until you have an evening when the Hum is loud or at least at typical levels, and then get in your car and drive to any location that has low ambient noise (out into the country, a very large park, whatever). Park with the windows closed, engine off, and then listen. I’ve tried this experiment a number of times and whether in a car, van, or truck, the Hum is the same as it is in my house. Good numbers of hearers report the same results. You could then repeat this but in a very large and quiet building.

I never discount the personal experiences of other hearers, but I encourage everyone – and myself – to question what we are sure of, to be open to the possibility that some of our initial assumptions and observations may not be correct.


22 Comments

  1. Mac Hanson says:

    With the insulation of the car by the tyres and suspension, that the hum is just as loud as in the house, reduces the probability of the hum being seismic in my view. The next thing to try, if anyone can, would be to build a Faraday cage with a mesh small enough to absorb microwaves. If that stops the hum or reduces it, then we should then look at microwave resonance in the brain. This could be a fluke effect of mobile phone or WiFi technology, or something more sinister such as HAARP, PHaSR or ADS technologies being used.

    • This is one topic on which there seems to be considerable misunderstanding. If microwaves are in any way to blame for the Hum (and I am all but certain they are not), then a simple layer of metal foil will block it. However, if VLF radio waves are involved (and I think they probably are), then a typical Faraday cage is useless to test that. You see, VLF waves (e.g. f=10 kHz) can penetrate deeply into most materials, such as ocean water and even a full inch of solid aluminum. This ability to penetrate materials is called “skin depth”, and for VLF waves the skin depth is very large, which is precisely why naval powers use it for long distance communication that can penetrate the ocean. I discovered/noticed that a 1.2 thickness of mild steel would provide full blockage against VLF waves, but there will be some very tricky construction involved in the device. I am trying to sort those issues out with the help of experts.

      • Mac Hanson says:

        Interesting point but VLF waves have large wavelengths and are unlikely to resonate with minute crystals in the brain. Microwaves do resonate with the brain and there are well documented experiments and weapons based on this!

      • I make no suggestion that crystal resonance or other type of piezoelectric effect is operating. Rather, I suggest that pulsed RF in the VLF range (i.e. f < 30 kHz), can activate human nerve cells. This has been postulated and demonstrated. Look for my blog post with the title "A little known paper connects the dots". As for microwave "hearing", it does exist, but has only been demonstrated when the source is massively powerful and aimed directly at the forehead of the person. And the sensations reported from that type of hearing are of course dramatically different from what we experience with the Hum.

      • Mac Hanson says:

        I doubt that long wave radio waves would have such an effect. For radio waves or their carrier waves to be interpreted as sound in the brain there needs to be a resonance. It’s the same principle as an aerial.
        It’s not true that microwaves have to be directed at the forehead, weapons already exist that can be used for crowd control and to take out aircraft pilots. During the cold war Russia transmitted a shortwave signal with a 10 Hz beat around the world except in the USSR; Western scientists believed that a small change to the wave frequency into the microwave range could have had global catastrophic effects.
        Don’t dismiss the microwave scenario as there are microwave mobile and WiFi communications everywhere!

      • You missed my point about skin depth, which applies to smart meter emissions as well. A thin layer of foil will effectively block all EM energy in the GHz range. This is why foil will not block the Hum (and this has been tested many times). As for resonance, I guess I disagree with the science you present, unless you are using the word “resonance” in a way that I am unfamiliar with. I hope the publisher doesn’t object to my pasting in the abstract, but here is the precise description of the mechanism. They make it quite clear that long wave emissions can have this effect.
        ———————
        A biophysical model for the action of oscillating electric fields on cells, presented by us before [Biochem. Biophys. Res. Commun. 272(3) (2000) 634–640], is extended now to include oscillating magnetic fields as well, extended to include the most active biological conditions, and also to explain why pulsed electromagnetic fields can be more active biologically than continuous ones. According to the present theory, the low frequency fields are the most bioactive ones. The basic mechanism is the forced-vibration of all the free ions on the surface of a cellÕs plasma membrane, caused by an external oscillating field. We have shown that this coherent vibration of electric charge is able to irregularly gate electrosensitive channels on the plasma membrane and thus cause disruption of the cellÕs electrochemical balance and function [Biochem. Biophys. Res. Commun. 272(3) (2000) 634–640]. It seems that this simple idea can be easily extended now and looks very likely to be able to give a realistic basis for the explanation of a wide range of electromagnetic field bioeffects.

        ————–

      • Thank you for your explanation, I’m aware of the ELF theory but struggled to believe it; mostly due to my own experience when in the Royal Signals of military microwave technology, however you’ve prompted me to delve deeper into ELF research now as I can see how ELF can affect the ions of cellular plasma membranes!

        This then means that facilities such as the Russian ZEVS ELF transmitter (81.6 to 82.7 Hz) and the US WMT and MTF ELF transmitters (72 to 80 Hz) could very well be the culprit. They actually use the earth itself as a transmitter and the Russian transmitter is 10 dB stronger than the US transmitters!!! However the HAARP project has been and could still be projecting similar ELF transmissions using considerably higher power to increase energy in the ionosphere.

        What effect would 80 Hz have on the human brain? Gamma waves in the brain range between 40 and 80 Hz. Interestingly Tibetan monks have been found to have strong gamma brain waves at 40 Hz, however, exposure to 80 Hz for long periods has the effect of tuning the brains gamma waves to this frequency which could have a calming effect on a population, rather like adding Fluoride to the drinking water of Jews in Nazi concentration camps to make them docile!

      • I read the article several times, and I had to dig deep into my biology – and chemistry – to get a better grasp of it. The authors claim that about 16 KHz is the upper limit of bioactive frequencies (check the graph Fig. 1 on p. 98).

        I wish that I could have 90 minutes with a biophysicist so as to pick her/his brain on this issue.

      • We are living proof that the authors are wrong! If we are able to interpret the VLF into virtual sound, then 80 Hz has to be a bioactive frequency. Moreover, meditation with sounds of set frequencies can show that brain waves mirror these frequencies.

      • Are you familiar with the concept of “beats”; i.e. the type we use when tuning a guitar?

      • Mac Hanson says:

        Yes, the hum I can hear is 80 Hz with a 1 Hz beat!

      • By “beats” I am referring to how our brain interprets frequencies that are close to each other. For example, if you strike an A (440 Hz) on a guitar, and at the same time strike an A an another guitar that is slightly out of tune, say, 403 Hz, then your ear and brain will interpret this as a 3 beat per second pulse ( because 403-400 = 3). So I wonder if something similar might be happening with the Hum. While it is possible that the 56.5 Hz tone that I hear is in fact caused by something oscillating at 56.5 Hz, there is the other possibility that there are two frequencies that are 56.5 Hz apart in frequency, and the tone I hear is in fact a beat frequency. Just some theorizing.

      • Glen, I’m not hearing 1 Hz, I’m hearing 80 Hz with a 1 Hz beat or pulse. That suggests to me that there are two frequencies very close to 80 Hz whose interference creates a 1 Hz beat, but as one frequency has a larger amplitude than the other, the 80 Hz frequency is still audible. That fits quite perfectly with the US and Russian ELF transmissions!!! As they use the Earth herself as a transmitter then this would easily be detectable around the world.

        I could be hearing a higher harmonic of infra sounds that are interfering to give a perceived virtual hum, there are many infra sounds but nothing very consistent that would produce what I’m hearing. On ELF there is of course the Schumann’s frequency of 7.83 Hz but the 10th harmonic would be 78.3 Hz, which is too low and bearing in mind that the amplitude of each resonant harmonic drops to a fraction of the previous one, the 10th harmonic would have a lower amplitude than background noise. I believe that the highest Schumann’s resonance harmonic detectable is the 6th.

        The next question is: Why are only about 1:50 people able to perceive the hum? – Without trying to sound too “Close Encounters and the X-Men meet the Scanners”, do we possess a gene that makes us sensitive to certain frequencies of ELF or could it be something as simple as we have a higher than average intake of iron in our diet which is lining our cell plasma walls???

      • Thank for this excellent post.

  2. Melissa says:

    Hi Glen,
    I did that yesterday; drove across a bridge to the next town, drove to two different quiet locations in that town, turned off the car, and–heard the hum. It isn’t QUITE as loud as when I’m at home. I do feel it more strongly in certain places in the house, and it appears to me that some walls, floors and certain chairs transmit vibrations more consistently and strongly. For instance, it’s pretty quiet the kitchen and bathroom, maybe because there’s less wood? Just a guess. I often feel I’m living inside a drum.

    Also, you may have already commented on this; I wondered if the fact that my home is situated up on a hill and above a garage there is more possibility of receiving and transmitting resonance than those houses lower and sitting directly on a foundation on the ground. Again, just a guess.

    It’s hard to think with all this noise, haha.

    Thanks for your hard work and continued research. It makes a big difference.
    Melissa

  3. dennis cherry says:

    it seems like the more solid the area the louder the noise is here in west ky. particularly over a concrete slab , and in a solid concrete storm shelter above ground . about the size of a regular bank vault. that may be deceptive as the concrete tends to block out all other noise from the outside air. also i noticed several years ago that at times, it got so intense that i swore i could hear the bedspring coils ringing in the bed just below my my head around 3:00am.

  4. George G. says:

    Glen,
    So you have estimated the Hum’s frequency to be 56.5Hz?

    • I perceive it at around that frequency everywhere I travel. Note that perceived frequency is one of the database questions.

      • Mains hum is 50Hz in UK, 60hz in US. People in UK, myself included, perceive the hum about 80Hz, this has been widely reported in the press. I’very also compared this to frequency samples online. Does this mean we’re barking up different trees?

  5. George.G. says:

    No. We just seem to have different reference points. My reference tone is 50Hz. Aussie mains hum.
    Whenever the Hum is at maximum intensity here, I listen to it beating against our AC powered appliances (fridge, freezer, etc.) The slow rate of the beats lead me to believe the Hum is less than
    50cps. Inside my workshop, which is DC powered, I tune my signal generator to 50Hz.and decrease the output level till I “perceive” beating. This can only happen when Hum is at max. level.
    If Hum is below max. or not present, there is a risk that spurious noise will beat with the sig. gen. such as a truck down the road, a light aircraft, etc.So, having established I have indeed produced Hum beat, I then reduce the sig.gen. frequency until the beat stops. At this point, the gen. display hovers around 30Hz.

    Your perception (80Hz.) could easily be 50Hz. mains plus Hum. Using the same reasoning, one might think my perception is Hum minus mains. Glen perceives approx. 50 to 60Hz. We are not barking up different trees, we seem to be tangled around the same tree, but we are observers from different geographic locations. I am starting to suspect that Mr. Doppler is having a small but significant say in this matter. Too many people north of my location are reporting 75-80Hz. That is another story, which I will present when or if the discussion requires.

    A word of warning. Do not try and approximate the Hum’s pitch with any online tone. IT MUST BE SINEWAVE. Square waves have multiple harmonics, and will deceive you. Crappy computer speakers will produce square waves when overdriven, as will inferior amplifiers, headphones, etc.

    Until next time,
    Cheers and happy experiments.

    G.

  6. Jennifer says:

    I’ve noticed that if I press my ear up to the wall of my house (where I hear the Hum) the low droning vibrating hum stops and I can hear a faint mechanical sound like an appliance running, but no appliances are on. It sort of sounds like the fridge is running or the washing machine or dishwasher from a distant part of the house. But everything is off, nothing is running.
    Does anyone else hear this in their house?

    • Benoit Massin says:

      Hello Jennifer, I think that almost everyone hears it in the house because the other sounds are diminished. Could you reproduce the same experience in your car at night when everything is calm, with the caps and without the caps? If you hear it in your car, can you see areas where you do not hear it? Thank you

      Benoit.

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