We have proposed a method for estimating the vibration acceleration level of the floor structure with high accuracy by preventing the mounted resonance of the carpet floor. In this paper, using the method proposed in this study, we conducted an experimental study on thick tatami, unlike carpets. As a result, it was suggested that when a tatami with polystyrene foam as the core material, which is generally and commonly used, is installed on the concrete slab, the mounted resonance is prevented and the vibration acceleration of the concrete slab is accurately calculated.
