Hi, I'm trying too, like you hear the hum better when the background noise is low, IMHO same with detector, I'm now building frequency isolation box, using varius materials to distinct the hum from background noise.
Τη Κυριακή, 27 Απριλίου 2014 5:25:15 μ.μ. UTC+3, ο χρήστης John Dawes έγραψε: > > I have recently made some improvements to my Hum energy detector and can > now make measurements of the Hum energy to within two decimal places. > > > > Using my own perception of the Hum level I made measurements at the times > when I perceived the Hum to be high and low. > > > > I found that the perceived Hum did follow the measurements but the energy > level between these two points was only 4 per cent of the total energy and > I was surprised to find that such small changes in the energy level can > produce such large changes in the perceived Hum. > > > > Making measurements at various times of the day and night I found that the > energy level is constantly changing but I could find no distinct pattern as > yet. > > > > The largest deviation I have found so far is 4.6 per cent but if these > deviations are ignored then the overall Hum energy for the day and night is > surprisingly stable. > -- 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/d/optout.
