- 著者
-
木村 隆一
鈴木 三郎
今枝 彬郎
- 出版者
- 公益社団法人 日本航海学会
- 雑誌
- 日本航海学会論文集 (ISSN:03887405)
- 巻号頁・発行日
- vol.88, pp.11-18, 1993
- 被引用文献数
-
2
If direction of horn-signal can be detected, it would be very useful for the safety navigation. The signal which was generated by a ship (Horn-ship) was picked by three microphones placed on the compass deck of another ship (Measurement ship). A series of experiments were carried out for various distance between two ships in the range from 600 to 2000m. In this system, the signal was digitalized with an A/D converter and sent to the microcomputer, and the direction was detected using these data. The error was less than ±15[deg], but the direction could not be detected, when SPL (sound pressure level) of horn-signal was about 50dB.