船内吸音構造の組合せ変化とその効果
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概要
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As there are lots of unknown points, from the point of acoustical view, concerning relation between the various combination of sound absorbing structure and/or sound arresting structure and the specific character of the materials to be used and also concerning how to devise the counterplan in case of applying the said relation to the vessel, so we conducted tests and experiments both in the laboratory and on board the vessel to bring this subject to light and consequently the following facts were ascertained. 1) Heretofore, the countermeasure to sound pressure of low and medium frequency has been considered difficult due to few materials suitable for sound-absorption and sound-areestment, further study, however, in selecting the way of combination of sound absorbing structure and/or sound arresting structure makes it possible to find the countermeasure. 2) The places with source of noise like engine room of the vessel shall be an separate isolation ward and it is more effective that sound arresting device shall be mainly adopted at such places, using sound absorbing device as a supplementary method. 3) The particle board, the plywood and the asbestos board hitherto used can be practically applied with in the accommodation quarter of the vessel by the usual working way, provided, however, any special case is excepted. 4) Some data could be obtained in order to make it easy to select the most appropriate method in various situations and circumstances.
- 社団法人日本船舶海洋工学会の論文
- 1967-07-30