Source google image: https://www.monisolationecologique.com/media/product/d55/steico-therm-20mm-a116-sd-panneau-isolant-phonique-en-fibre-de-bois-steico-therm-sd-20-135×60-330553-de-steico-b32.jpg
Isolation acoustique 20mm
Source google image: https://www.monisolationecologique.com/media/product/d55/steico-therm-20mm-a116-sd-panneau-isolant-phonique-en-fibre-de-bois-steico-therm-sd-20-135×60-330553-de-steico-b32.jpg