Open-Air Festival Off-Site Neighborhood Noise-Curfew (LAeq / LCeq) ISO 9613-2 Predictor

Deterministic ISO 9613-2 octave-band outdoor sound propagation (geometric divergence + atmospheric alpha(f,T,RH) + ground/meteorological C_met) engine (.pdf, .json, .csv, .svg) built for 10EaZy, NTi Audio, Bruel & Kjaer, L-Acoustics — zero-upload ephemeral Wasm RAM execution.

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