Total field energy by integrating the measurements
Established physics
The report totals the field a device produces by integrating the measured field over the area it covers.
Where it appears in the report: Total Effective Flux, secondary field metrics
The evidence
For a round accessory, the field is summed in rings outward from the center. For a rectangular mat, it's summed over the measured grid. Both are standard ways to add up a field over an area. The report matches the method to the shape, so a round coil and a flat mat each total correctly.
Concentration score asks how much of the field lands in its strongest zone. The gauge on the left is that score as a percentage, the same gauge the report shows. On the right is the field it measures: the core is the region at or above half the peak strength, and the score is the share of the field inside it. A tightly focused coil puts most of its field in the core and scores high; a broad coil spreads it out and scores lower. It describes focus at the surface, not depth.
Primary sources
Standard flux integration over area; any introductory electromagnetics text.
