🚀 go-pugleaf

kolstad@cae.wisc.edu (Joel Kolstad) writes:

>Ok, perhaps I should have said, "you'd be hard pressed to even measure the
>extra field not caused by the background EM..."  In others words, I meant that
>simply having the blanket plugged into the wall socket creates only a slightly
>larger "antenna" that slightly perturbs the local EM field.  The overall
>effect, though, will be to create an EM field that I'd hope you'd agree is
>negligibly different from the one that existed before I plugged the electric
>blanket in, no?  (Assuming a short cord... i.e., that the still connected
>neutral line adds a small length to the overall "antenna" of the entire
>household wiring)  (And when I say "negligibly different" above, I mean in
>terms of average magnitude that's hitting people, and therefore health effects)

About two years ago I built 8 EMG (Electromyographic) devices for my wife's
dissertation.  Basically, the subjects would attact electrodes to their 
jaw and whenever they would clench their teeth throughout the night, the
emg units would record the amount of this activity.  (The muscles emit
electric potentials when active.

We noticed when an electric blanket was used OR plugged in, the EMG units
would accumulate rapidly.  Only when the blankets were unplugged would 
the units not record any activity (when the subject was laying still &
not using the facial muscles).  We had to instruct the subjects to unplug
their electric blankets while they participated in the study.

We definately leave ours unplugged!


Steve