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Originally Posted by Kawai_man /img/forum/go_quote.gif
Ok... first of all EMF is not just one thing there many types of Emfs, in this case were talking about filtering RF noise from house wires, which is definitly not a "gimmick" ask any HAM radio operator they filter rf noise using capacitors ferrites ect...( though of course they dont filter them for health reasons)
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Some members here seem to thing there is severe underlying health issues involved with exposure to magnetic fields. One person commented that techs hide behind a room when taking MRI scans as if there is grave physical danger. The computer and data storage is what's being protected.
J Magn Reson Imaging. 2000 Jul;12(1):2-19.
"In the absence of ferromagnetic foreign bodies, there is no replicated scientific study showing a health hazard associated with magnetic field exposure and no evidence for hazards associated with cumulative exposure to these fields. The very high degree of patient safety in strong magnetic fields is attributed to the small value of the magnetic susceptibility of human tissues and to the lack of ferromagnetic components in these tissues. The wide range of susceptibility values between magnetic materials and human tissues is shown to lead to qualitatively differing behaviors of these materials when they are exposed to magnetic fields. Mathematical expressions are provided for the calculation of forces and torques."
You are right RF filtering is for electronic components not people.
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Originally Posted by Kawai_man /img/forum/go_quote.gif
Theres been ALOT of studies proving how harmful the different types of EMFs are. Most of the studies for magentic fields have been focused on the 50 and 60hz fields, it has showed that even with low level fields under 2 gauss changes to cells particularly red blood cells have been observed. In Sweden pregnant women are excused from workng near electronics particularly computers and Sweden has the strictest standards regardng eletronic EMF emmissions in the World. In France I believe they already passed a law prohibiting wi-fi in elementary schools.
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No double blind studies. What I means is these are epidemiological studies that compare rates and makes inferences but there is no clear tie to disease. Another issue with a lot of these studies is that can not homoginize the sample population and thus makes the studies moot.
Med Lav. 2008 Jan-Feb;99(1):16-28.
Experimental studies carried out on volunteers showed that short-term exposure to SMF induces a variety of acute effects: (i) vertigo, nausea and a metallic taste in the mouth occur during body or head movement with SMF in T range and may result in a possible negative influence on the performance of workers during critical procedures, (ii) changes in blood pressure and heart rate within the range of physiological variability occur for exposures to SMF up to 8 T (iii) induction of ectopic heart beats and increased likelihood of reversible arrhythmia (possibly leading to ventricular fibrillation) may occur in susceptible workers) (iv) a decrease of working memory and eye-hand coordination are dose-dependent for exposures to 1.5-3 T SMF and may affect the performance of workers executing intricate procedures. The limitations of the available studies,
however, do not allow any firm conclusions to be drawn about the effects of SMF on the described endpoints.
There are acute effects but no proof that sustained damage is caused.
