For the purpose of examining vibrational and acoustic characteristics of a boarding interior finish on a reinforced concrete wall, vibration measurements with the discrete calculation method were carried out. The influence on the sound radiation power by factors of the boarding wall; materials of the board, types and intervals of the backing, depth of the air layer, are examined using the RC structural model. The results of measurement mentioned below are obtained. When the interval of the backing becomes wide and the depth of the air layer becomes deep, the magnitude of the acceleration in a low frequency range tends to increase. The characteristics of the sound radiation efficiency have a hollow in the frequency range of about 500Hz-1000Hz. The making of the boarding wall with lesser sound radiation is capable by combing the both characteristics of the increasing vibration and decreasing sound radiation.
