Baluncore said:
Detecting muscle noise, EMG, is difficult.
ECG instruments are commonplace and not too high tech. They used to consist of nothing more than sensitive galvanometers, in the past. The electrical activity of the heart is measured by placing electrodes (pads) at a number of places on the torso. They record signals in the order of a few mV but that is very different from a
radiated field. Is EMG a different thing, apart from the muscles it looks at?
The OP is referring to an EMF meter which, afaiaa, is for assessing the potential harm from exposure to EM fields. What he's been measuring / detecting will almost certainly be the effect of the presence of his body on the fields that are there anyway. An FM radio can be affected greatly by the presence of a human - either improving or worsening the signal strength, depending, in the same way as wiggling the whip antenna about. The body acts like a piece of metal of similar size and re-radiates signals in the vicinity.
Without knowing about the frequencies involved, it's hard to comment usefully on what he's seeing but there's not much chance of it coming
from his body if a simple hand held device can register it.
PS EM Hazard assessment is a bit of a black art and getting relevant and meaningful readings of fields is pretty hard. Not least, the antenna / probe needs to be well calibrated and characterised if the results could be accepted in a court of law when someone claims Industrial Injury!
