고등어(Scomber japonicus), 불볼락(Sebastes thompsoni) 및 쥐노래미(Hexagrammos otakii)에 의한 광대역 음향산란신호의 시간-주파수 분석

Lee, Dae-Jae

  • 투고 : 2015.02.19
  • 심사 : 2015.04.10
  • 발행 : 2015.04.30


Broadband echoes measured in live chub mackerel Scomber japonicus, goldeye rockfish Sebastes thompsoni, and fat greenling Hexagrammos otakii with different morphologies and internal characteristics were analyzed in time and frequency domains to understand the species-specific echo feature characteristics for classifying fish species. The mean echo image for each time-frequency representation dataset obtained as a function of orientation angle was extracted to mitigate the effect of fish orientation on acoustic scattering. The joint time-frequency content of the broadband echo signals was obtained using the smoothed pseudo-Wigner-Ville distribution (SPWVD). The SPWVDs were analyzed for each echo signature of the three fish species. The results show that the time-frequency analysis provided species-specific echo structure patterns and metrics of the broadband acoustic signals to facilitate fish species classification.


Time-frequency analysis;Spectrogram;SPWVD;Broadband acoustic scattering;Echo signature


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피인용 문헌

  1. Acoustic Identification of Six Fish Species using an Artificial Neural Network vol.49, pp.2, 2016,
  2. Time-Frequency Feature Extraction of Broadband Echo Signals from Individual Live Fish for Species Identification vol.49, pp.2, 2016,
  3. Age and Growth of the Goldeyes Rockfish Sebasetes thompsoni in the Ulleungdo and Dokdo Areas vol.48, pp.6, 2015,


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