Basic Research on Direction-detecting of Horn-signal

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  • 汽笛音源の方向検出に関する基礎的研究
  • キテキ オンゲン ノ ホウコウ ケンシュツ ニ カンスル キソテキ ケンキュウ

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Horn-signal is very important for the safety navigation. When horn-signal is generated by other ship, the direction of signal-source is only judged by sense of hearing. This paper describes the system detecting the signal direction automatically. In this system, when horn-signal is received by three microphones placed in different points, time-lags occurs among the times that signal is caught by each microphones. The direction of signal-source is calculated by the time-lags. As a result, when the signal-source is as much as 1,600 meters distant from measurement place, the direction of signal-source is detected within error value of ±5 [deg].

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