IMHO try to calibrate the device with some kind of vibration source, eg 30, 40, 50, 60, 70 hz interesting to see the response.
2014-05-15 12:45 GMT+03:00 jphoenix <[email protected]>: > Hi again, > few thoughts > resonant, peak frequency vs length of the stick? The cilia have many > sensors each responsible for a narrow range of frequency. > > > Τη Τετάρτη, 14 Μαΐου 2014 7:05:49 μ.μ. UTC+3, ο χρήστης John Dawes έγραψε: >> >> >> >> I have attached here a photo of the device used to make recordings of the >> Hum. >> >> The light source is a small Lazar and the cell is a photo resister. >> >> >> >> The device must be mounted on a substantial base, I have used here a >> marble block making a total base mass of 800 gms and with advantage this >> could be increased. >> >> On Tuesday, March 18, 2014 10:28:24 AM UTC, John Dawes wrote: >> >>> I have posted here a recording of the Hum made on Tuesday March 18 at >>> 9am. >>> Once again I would remind that this may not sound exactly like the Hum >>> for it is not a sound recording, that is, it was not made using airborne >>> sound waves. >>> If the file is opened in suitable software. Like Audacity, and expanded >>> the modulation pulses are clearly visible and the question remains, are >>> these pulses the product of natural phenomena or man made. >>> Audacity is available as freeware. >>> >>> -- > You received this message because you are subscribed to a topic in the > Google Groups "Hum Sufferers" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/hum-sufferers/4EaUhglMbM4/unsubscribe. > To unsubscribe from this group and all its topics, 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. > -- 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.
