AFILS Hearing-Loop (IEC 60118-4 400 mA/m) Concrete-Rebar Metal-Loss & Driver Sizer

Deterministic 3D Biot-Savart rectangular loop magnetic field H_z(x,y) + conductive slab image-current eddy loss + inductive reactance V = I*sqrt(R^2+(wL)^2) engine (.pdf, .svg, .json, .csv) built for Ampetronic, Contacta, Listen Technologies, Williams AV — zero-upload ephemeral Wasm RAM execution.

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