Trev The lower bar plot series 2 is a measure of the depth of modulation which is proportional to the intensity of the Hum. This plot is not constant but changes slightly at various times of the day, however, the shape remains constant. I am surprised to find just how little the measured Hum intensity changes, I expected to find large swings to match my own perception of the Hum level. Without further evidence I can only think that some of the large variations that I experience from time to time are due to changes in my own body. I will post further thoughts on this.
>From the displacement, the size of mass and the frequency of the vibrating element a measure of the energy can be made and measuring the depth of modulation will give the Hum level. At the highest point on the series 2 plot I estimate the energy of the Hum was 4 micro Watts per square centimetre. On Thursday, July 18, 2013 11:03:27 AM UTC+1, Trev wrote: > > Interesting, John. > Could you expand on what the units are and how thw hum on the lower scale > was gauged? > Point No15 also drops markedly. Is this roll off of the human ear > mechanism in play? > > On Tuesday, 16 July 2013 10:58:04 UTC+1, John Dawes wrote: >> >> A longstanding problem has been an explanation as to why some people hear >> the noise and others do not. Using a device modelled on the cilia of the >> inner ear I recently posted some details describing how an individual could >> be tuned to the frequency of the Hum energy and experience the noise. Using >> the same equipment set to vibrate at various energy levels I have measured >> the amount of energy transferred from the Hum. In the attached graph the >> height of the bars labelled series 1 represents the energy of the vibrating >> element, and on the same scale, the bars of series 2 is a measure of the >> energy transferred from the Hum. It can be seen that here is yet another >> resonance curve that appears to be akin to impedance which occurs in >> electrical and mechanical systems. If these results can be likened to the >> cilia of the inner ear it will explain why a person who is in tune with the >> Hum frequency and at the same time matches the Hum energy level, will hear >> and feel the Hum effects to an excruciating degree. >> >> It is well known that only a very small percentage of the population is >> affected by the Hum, and this being so, it is extremely unlikely that >> anything can be done to stop the Hum at source. However, by moving the >> cilia from the critical values it would be possible to stop hearing the >> Hum. This must be possible because there are many cases where long time >> sufferers stop hearing the Hum. >> >> However, it must be remembered that the energy responsible for the Hum >> continues to rain down on all of us and whether this has any long term >> health effects remains to be seen. >> > -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/hum-sufferers. For more options, visit https://groups.google.com/groups/opt_out.
