小型船舶の衝突防止用警告音の収録と分析

概要

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According to the marine disaster agency, one of the most significant causes of collisions is the failure of lookouts and failure to sound warnings with the ship's horn. Under current regulations vessels of less than 12 meters in length are not required to have a horn. In the current study we examined the effect of using different types of beep sound for small vessels. The results are as follows : 1) The acoustic beep sound that we used in this experiment was divided into continuous wave and impulse wave tones. The decay difference of acoustic pressure by spacing becomes that difference of reference tones of spacing one meter because the coefficient of revolution expression to show decay by spacing of continuous sound of waves is equal. 2) There were three kinds of beep sound which showed not less than 70dB by spacing 50m, and it was sequence of Gong, Can and Whistle. 3) We found that the most significant sound for the small vessels is the Whistle when considering other factors of carrying nature, which used five kinds of beep sound.
社団法人日本航海学会の論文
1999-09-25