# Mappa acustica

> Visualise sound-level measurements and compute propagation with diffraction on real OSM buildings.

Practice: acustica
Field: ambientale
Status: Proto v0.6
Tag: ISO 9613-2, Maekawa, OSM, Leaflet, d3-contour
Method, assumptions and limits: <https://www.stline.it/en/wiki/acmap/index.md>
Repository: <https://github.com/stefanofante/acmap>

Page: <https://www.stline.it/en/tools/acoustic-map/>

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Demonstrative tool for environmental acoustics. Measure mode visualises sound-level surveys (CSV with lat, lon, Leq). Predict mode computes ISO 9613-2 propagation with a simplified model per octave band (63 Hz – 8 kHz): geometric divergence, ISO 9613-1 atmospheric absorption, a G-factor ground effect, and Maekawa diffraction on buildings fetched live from OpenStreetMap via Overpass API.

This file is a **descriptor**, not the tool's documentation: it says what the tool computes and by what method, in summary. Formulas, assumptions, validity conditions and limits are in the wiki linked above. The tool runs in the browser at the page given.