➀ The Fraunhofer Institute for Digital Media Technology (IDMT) has initiated the research project QualiBolS to develop a contactless acoustic monitoring system based on AI for ensuring the quality of bolted焊接 connections in construction projects. ➁ The project aims to replace traditional, resource-intensive quality control methods with real-time monitoring. ➂ The system uses AI algorithms to analyze welding sounds in real-time, classifying them as 'in order' or 'not in order' and identifying irregularities. This method promises significant time and cost savings, as well as increased safety in construction.