This is good John. The hum freq. is too high for me -but the insistance & clean spectrum spread stand out as reminiscient of what I 'get'. It looks like it's based on the US 60 Hz mains supply standard interestingly enough! The beat can be seen on the mod file.[Again too strong for me] The third harmonic is strong but the most noticeable aspect is the clean waveform indicated in the SA file. I've posted the wav and Spectrogram files here for ease of use.[under JDHum This is a early morning stab it it- but I hope it helps, if you haven't looked this far into the recording.
>From the above- what you have captured seems to be 'proof of concept' shown in an idealised way -not mixed or modulated by atmospheric or ground conditions. Why 60Hz ??? Are you picking up from the US or continent? On Jun 17, 3:21 am, snowcountry <[email protected]> wrote: > Sorry John but thats not the hum I'm hearing..............mine is more > of a flat bass hum, no vibration in the sound. > > On Jun 16, 2:02 pm, "John Dawes" <[email protected]> wrote: > > > > > It is not possible to record the Hum as a sound wave for as a sound wave it > > does not exist, however, it is possible to allow the energy of the Hum to > > interact with a small vibrating mass and record the resulting modulation. > > > Observations and measurements using this method have been described on my > > web site at various times and most experiments have used a small mass fixed > > to the end of a flat vibrating spring, however, to produce this recording a > > loud speaker was used, the cone of the speaker becoming the vibrating mass. > > > The movement of the cone is extremely small but can be readily detected > > using a laser beam and photo electric cell. > > > Note. This is not a simulation, whether or not it sounds like the human > > interpretation of the Hum is irrelevant the purpose being to detect and > > measure the energy responsible for causing the Hum</B> > > > The original recording was made in WAV and then converted to MP3 because of > > web space limitations > > > To hear the recording go to > > > http://www.johndawes.pwp.blueyonder.co.uk/hum1.htm- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
