Before the thread may get closed I would like to say that it was a good and interesting topic. Please let me continue, as I did a lot of similar work as Colin posted, in my research institute years and also had several publications.
To measure H and B we may use a simple loop probe and the induced voltage will be proportional to H and B as per Fig. 2.
Fig.1. Simple loop probe
Fig.2. Calculation of induced voltage (reprinted from my article for Slaboproudy Obzor)
Now let's make a simple test. The probe from Fig.1 is used to measure magnetic field radiated from the
1) magnetically shielded power cord
2) unshielded power cord
We will measure loop probe voltage with power cord connected to 230Vac and
a) unloaded
b) loaded with 1500W, resistor load
1a - magnetically shielded cord no load
1b - magnetically shielded cord 1500W
2a -unshielded cord no load
2b -unshielded cord 1500W
One may use his own head to calculate radiated H and B from 2b plot and 4cm probe diameter as a homework.
@amirm , before you potentially delete this thread would you please move my post to a new thread. Thank you.