This from the Hum Forum...................mirrors my observations of the Hum, when it's on that is........ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I'm conflicted on the issue of Radio Interference being the cause of the HUM, yet the incident that I had the other evening is more difficult to explain from a strictly acoustic effect. I was sitting on the couch, remote in hand, watching the movie "Prestige" largely in Fast Forward mode. I like some of the meandering music used in the movie and was indexing the DVD to sections that contained a decent amount of the music. (Incidentally,
During one of the pauses in sound that occurred (from me hitting FF) when the volume was muted, and I was almost struck dumb by the volume of the HUM that became evident. It was so loud I was concerned and missed the opportunity to hold my ears to see if I still perceived it as loud. It did not last long, a few minutes, and my wife could hear it as well, sitting within a few feet of me. It subsided within minutes into the level that we are accustomed to hearing when the HUM is present. Radio interference would be a handier method of explaining this outburst, as the onset and decay were so sudden. Anyway, I also cannot wait to return to the NRQZ. It will be an interesting adventure. I found some points on the HUM, properly attributed. I have no idea how accurate they are, but they are talking points for the forum. I would encourage others to comment on various aspects of the following. Be well. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SOME NOTES William Beaty 1997 If the "Hum" is tinnitus (and arises in the brains of affected individuals), then why do these individuals note the disappearance of the hum when travelling to some (but not all) other states, or to other countries, only to find that it immediately reappears when they return? If the "Hum" is caused by microwave beams, why does a faraday cage have no effect on the perceived intensity? If the "Hum" is acoustic, and hum-sensitive individuals sim ply have an extended low-freq hearing cutoff, then why do microphone measurements show no spectrum peaks? (note: A.H. does find spectrum peaks in Denmark hum. But U. of NM finds none in the Taos NM area.) If the "Hum" is acoustic, why do some hum-sensitive individuals turn out *not* to have extended low-freq hearing sensitivity? There is one report of a hearing-disabled person who suffers from the Hum. If the hum is acoustic, then a thick-walled chamber, such as a pressure chamber, should shield it. No reports of this having been tried. If the "Hum" is from local industrial sources, why does it continue even during long term, wide-area power blackouts? If the "Hum" is from tornadoes, weather, aircraft, street sweepers, etc., why does it usually continue unceasingly for years? Sources of transient hums cannot be used to explain a continuing hum. If the "Hum" has a geologic source, what is the mechanism which converts underground stresses or movements into a continuous signal around 60hz - 80hz? And why don't microphones pick it up? If the "Hum" is caused by human electromagnetic perception of ELF waves, then hum-sensitive individuals should also be able to hear the magnetic field around a 60Hz-powered coil. They should perceive power transformers as being loud hum sources, or if the perception is nonlinear, then the more powerful field should swamp out the normal "Hum" they hear. If the "Hum" is caused by human electromagnetic perception, then why did the U. of NM people find no anomalous signals between 10Hz and 1000MHz? (Note: at VLF frequencies the E and the M components might be separate. A coil-based antenna might not detect electrostatic vibration, and a capacitor-based antenna might not detect magnetic vibration.) If the Hum is low frequency electromagnetism, then it should be easy to prove: build a simple hum-transmitter, such as a signal generator, a power amplifier, and a coi l. Encapsulate the coil to limit audio vibration but pass magnetism. If hum-sensitive people can hear the signal from the coil, but non-hearers cannot, then this would be strong indirect evidence for an EM source. Hum-hearers report that ear plugs work temporarily, but soon the Hum is heard again even with plugs. One person reports that use of just one earplug can give some relief. The hum commonly causes marital strife, since usually only one partner can hear it and the other cannot. Women report problems with the hum more often than men. The hum is perceived as louder indoors than outside. The hum seems louder a few feet from a wall, but seems less loud at the wall's surface. If the hum is electromagnetic, then a magnetic shield room with thick iron walls should shield it. No reports of this having been tried. If EM, then a negative feedback coil system might cancel the signal and thereby act as a shield. Micheal Theroux hum article in Borderlands magazine. Detector: suction-cup telephone pickup coil with NIB magnets on either side, placed in the center of a long piece of plastic sewer pipe. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
