舶用内装材の音響的性質について

概要

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In order to reduce the airborne and the solidborne noise in the ship compartments, it is important to know some acoustical properties, such as, "abstrahlfaktor", transmission loss, and damping effect of joiner structures for the ship.In this experiment, using a coupled reverberation room, the measurement of these properties were made through the sample 2 m×1 m in size, of several types of fundamental joiner structures, excited by the airborne noise.In accommodation spaces, which may be predominantly excited by the solidborne noise, the average sound pressure level radiated in the room by the surrounding wall vibration will be calculated by the abstrahlfaktor, average absorption and the velocity level averaged over the wall.This calculated level will be the upper limit practically expected in this room.In engine room, which may be largely excited by the airborne noise, the level will be calculated by usual way of using transmission loss.As for the velocity level and their distribution in the ship compartments, further investigations are to be made.
社団法人日本船舶海洋工学会の論文