Posted by SArjuna on
URL: https://www.es-forum.com/digital-voice-recorders-tp1538504.html


Kattrina asksed about digital voice recorders.
My husband got a little digital voice recorder for $40. It has a
varying magnetic field while playing back, that varies with the loudness of the
sound. When someone on the playback laughs loudly, the magnetic field goes up
to 10 or 15 mG. (I could not check it while recording as it is full and my
DH is too busy to deal with it presently.)
Generally speaking, battery-operated gizmos are safe for ES people. I
have heard of a few cases of people sensitive to the batteries themselves.
Meaning, a battery just sitting there, not being used. Presume they must be
sensitive to the magnetic field, as I don't know what else it could be.
(Marc seems to be sensitive to the slight magnetic field produced by the
GS filters. Marc, are you sensitive to batteries?)
Some battery-operated gizmos do create RF, of course, and these are not
safe. A battery-operated flourescent bulb lantern creates its own RF as this
is how fleurescsents operate. I turned on on in a room with a radio on once
and the radio just screamed. I had never heard such a noise from a radio!

I use a solar-charged LED lantern with no problems at all. I love it.
It is bright enough to read by.
A battery-operated electric shaver or toothbrush will avoid the RF that
one would be exposed to if using a plugged-in unit. There will be a strong
magnetic field, though. I used to use a battery-operated rotary tooth brush,
but quit because it had a strong m field indeed and I just didn't know what
effect that might have on my living body.
At any rate, a battery-operated recorder will prevent the RF exposure
you'd get with a plugged-in recorder. Also, the magnetic field drops off
shasrply just inches away from the recorder. So setting it down rather than
holding it or having it around your neck should deal with the magnetic field
exposure. Just test the unit before you buy it to be sure you get good sound when
the person speaking is the distance away at which you would use the recorder.
Regards,
Shivani


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