Using a Gauss Meter

You may pick up a Gauss meter ($36 at http://www.lessemf.com/gaussmaster.html) and see what the levels are inside where you’ll be doing your training. You’ll probably find that the field produced by the transformer on the AC adaptor for your computer are much larger than those from other sources (since the strength of the signal falls at a rate that is the square of the distance (my recollection of physics may be a bit rusty). (You can also use it to detect ghosts and other paranormal entities per some websites).

Even better, take your laptop and an amp and see what kind of signal you get before you rent the space. I’ve only seen three situations where there was a serious environmental effect that couldn’t be resolved. One, in Zurich, was an office directly beneath a police station with major communication equipment in it (transmitting), one was in Sao Paulo where an office was less than a block from a transmission tower for a television station. The third was in an office in California–and we never did figure out what was causing that–but in all three cases doing neurofeedback was not feasible.