Stage Acrylic Drum-Shield & Acoustic Gobo Fresnel Edge-Diffraction Bleed Solver

Deterministic Maekawa / Kurze-Anderson acoustic barrier Fresnel-number N = 2*delta/lambda edge-diffraction attenuation + specular inner-wall reflection check engine (.pdf, .svg, .json) built for ClearSonic, GIK Acoustics, Primacoustic, Audimute — zero-upload ephemeral Wasm RAM execution.

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