This study proposed a construction management system, which is based on in-situ measurement method using ensemble averaging (EA method), for examining whether the constructed interior materials perform expected absorption performance. First, the reproducibility of the system was confirmed through the round robin test, in which the absorption characteristics of commonly-used single-layer materials were measured in three different rooms. Then, an experimental study on more complicated multi-layer materials revealed that the system is measurable the difference of absorption characteristics due to the slight difference of structure in materials. Finally, the system was applied to the development phase of materials, and the availability was demonstrated.
