Noise Measurement by Echo Integrator

• Takao Yoshimi

  National Research Institute of Fisheries Engineering

• Furusawa Masahiko

  National Research Institute of Fisheries Engineering

抄録

A method to measure noise at the output of echo integrators has been developed for precise estimation of fisheries resources by acoustic means. This method is more practical than the method to measure noise at receiver output, because noise contribution can be easily compared withthe volume backscat-tering strength (SV) of fish and because there is less ambiguity in noise measurement. Also a conversion equation of the echo integrator output to the equivalent noise spectrum level isderived. This facilitates the comparison, for example, between different echo sounding system.We applied this method to a dual beam echo sounding system on board research vessel Kaiyo-maru, and confirmed that the difference in noise SV of 5 dB agreed with the theoretical prediction.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 61 (4), 637-640, 1995

  公益社団法人 日本水産学会

キーワード

• acoustic survey
• noise
• echo integration
• noise spectrum level

詳細情報

• CRID: 1390282679406749440
• NII論文ID: 130003902734
• NII論文ID: 10004862946
• NII書誌ID: AA10993718
• DOI: 10.2331/fishsci.61.637
• NDL書誌ID: 3634090
• ISSN: 09199268
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3634090
• Web Site: https://www.jstage.jst.go.jp/article/fishsci1994/61/4/61_4_637/_pdf
• 本文言語コード: en
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