However, other woods besides those from factories need to be characterized, whether they are non-standard (as was the case for the 20-meter squared pieces dedicated to Notre-Dame de Paris!), still standing in the forest, or already in use. This is easily achievable now with the Sylvius application, coupled with the 4th generation of Sylvatest, a lightweight and mobile device based on ultrasound technology developed by Concept Bois Technologie (CBT). CBT presented this technology at the Bio Top innovation wood and bio-sourced materials competition.