The influence of the sound radiation from the each surface was examined for the purpose of using the prediction of Structure-Borne Sound as a design technique. The level of Structure-Borne Sound due to the environmental ground vibration is decided in the Multiple Coherent Output Spectrum of the inputs. So, the theory that the Multiple Coherent Output Spectrum of the input was divided into each surface was examined. Then, how to think about sound pressure by the composition of the contribution of the room each surface was shown. The interior material by the plaster board was constructed in the laboratory, and an influence by the difference in the ground work was examined by using the Multiple Coherent Output Divided Spectrum. It is compared with the concrete base side with the Light Gage Steel method, and a vibration response becomes big. But, the amount of sound radiation reduces. When the influence of the other side declined, it was become clear that it had an influence greatly in the Gypsum Lining method. When the influence of the other side became small, it was obvious that an influence of Gypsum Lining method become big.
