小型船騒音計測について

概要

論文の詳細を見る
The latest small coasters have high-powered engines to gain high speed. In the panels of the cabin wall the modern building materials are adopted. From the viewpoint of the prevention of the undesirable sounds of the cabin, the sound levels were measured at the engineroom, the auto-control room of engine, and cabins. The results of the measurements are as follows: 1. The sound levels between 10/10 and 1/2 power are almost the same, but they begin to decrease at 1/4 power. 2. The transmission losses of the sound levels at the walls are 10-20ph. 3. The sound levels at the engine room are 100-110ph between 100-1000cps. They are below the threshold of discomfort 117db, but the difference is smal. Thus it is necessary to decrease the sound levels and to increase the allowable exposure time to intermitted noise by arranging such as auto-control room.
社団法人日本船舶海洋工学会の論文
1969-07-30