수산해양기술연구(구 한국어업기술학회지) 58권 2호 (p.130-140)

광대역 자율 음향 시스템의 국내 최초 활용 시도와 광대역 음향 데이터 분석 방안

The first attempt of utilization of a wideband autonomous acoustic system and its general knowledge on analyzing the wideband acoustic data
키워드 :
Wideband,Autonomous echosounder,Frequency modulation,Wideband frequency response

목차

서 론
재료 및 방법
   광대역 자율 음향 시스템와 데이터 수록
   램핑(Ramping) 모드
   필터와 데시메이션(Filters and decimation)
   펄스압축처리(Matched filter processing, MF)
   FFT길이
   주파수 스펙트럼
   광대역 자율 음향시스템의 교정 및 현장조사
결과 및 고찰
   광대역 자율 음향 시스템 교정
   광대역 음향 데이터 에코그램 및 주파수 특징
결 론
사 사
References

초록

Recently, wideband acoustic technology has been introduced and started to be used in fisheries acoustic surveys in various waters worldwide. Wideband acoustic data provides high vertical resolution, high signal-to-noise ratio and continuous frequency characteristics over a wide frequency range for species identification. In this study, the main characteristics of wideband acoustic systems were elaborated, and a general methodology for wideband acoustic data analysis was presented using data collected in frequency modulation mode for the first time in Republic of Korea. In particular, this study described the data recording method using the mission planner of the wideband autonomous acoustic system, wideband acoustic data signal processing, calibration and the wideband frequency response graph. Since wideband acoustic systems are currently installed on many training and research vessels, it is expected that the results of this study can be used as basic knowledge for fisheries acoustic research using the state-of-the-art system.