抄録
This method to reduce low frequency noise of an interior space in an enclosed space excited by multiple force inputs was suggested based on the mass addition. Because, it is difficult to suppress all of vibration paths by a treatment at single union point therefore the identification of contribution of each path is important in Transfer Path Analysis(TPA). In this paper, the resonance sensitivities and anti-resonance sensitivities at the union point which has high contribution were used as an observation parameter of iteration process. By making the vibration node coincide with the union point, it was possible to removed the resonance peaks. The suggested method was applied to the acoustic cavity model and the reduction of noise level was achieved with small amount of mass addition.
