수산해양기술연구(구 한국어업기술학회지) 58권 3호 (p.223-229)

수산음향자원량 추정에 필요한 음향자료 분석 방안

Analysis on the estimating of fishery resources using hydro-acoustics
키워드 :
Noise removal,NASC,Acoustic survey

목차

서 론
재료 및 방법
   음향 조사 및 음향 시스템
   음향 데이터 분석 및 음향 잡음 제거
결과 및 고찰
   음향 잡음 제거 결과
결 론
사 사
References

초록

This study investigated the methods of effectively removing noises in the acoustic data collected from the cold water zone of the East Sea, and converted that data into NASC values for comparison and analysis. First, the noises accompanying the acoustic data were divided into background noise, impulse noise, transient noise and attenuated signals according to the pattern characteristics. Then, the NASC values before and after noise removal were compared. As a result, the background noises were found to show the highest difference of 6,946 times in the NASC values before and after removal. The attenuated signals showed that the NASC values were higher after the removal.