A broadband target strength measurement method for weakly scattering animals using a 50-ms-long linear frequency modulated signal in a small tank

Abstract The target strength of hairtail (Trichiurus haumela) in the Yellow Sea was measured in situ with a 38 kHz, split-beam echosounder on 2 January 2001. The fish measured were of the 2000 year class, its anal length ranged from 62 to 115 mm, with a mean of 89.8 mm. The mean target strength of these young hairtail was estimated to be −49.2 dB, with a 95% confidence interval of (−49.4, −49.0) dB. This provided a rare and useful reference for the acoustic-abundance estimation of hairtail.

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A Novel Method for Direction of Departure Estimation Using a Linear Frequency Modulated Signal

2007 European Conference on Wireless Technologies ◽

10.1109/ecwt.2007.4403969 ◽

2007 ◽

Cited By ~ 1

Author(s):

Sofia Martinez Lopez ◽

Bernard Huyart ◽

Hajar Elarja

Keyword(s):

Linear Frequency ◽

Direction Of Departure ◽

Novel Method ◽

Linear Frequency Modulated Signal

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Error estimation in the acoustic target strength measurement of Antarctic krill

'Challenges of Our Changing Global Environment'. Conference Proceedings. OCEANS '95 MTS/IEEE ◽

10.1109/oceans.1995.528545 ◽

2002 ◽

Cited By ~ 1

Author(s):

T. Pauly ◽

J. Penrose

Keyword(s):

Error Estimation ◽

Antarctic Krill ◽

Target Strength ◽

Strength Measurement ◽

Acoustic Target

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Wigner-Ville Distribution Associated with the Linear Canonical Transform

Journal of Applied Mathematics ◽

10.1155/2012/740161 ◽

2012 ◽

Vol 2012 ◽

pp. 1-14 ◽

Cited By ~ 33

Author(s):

Rui-Feng Bai ◽

Bing-Zhao Li ◽

Qi-Yuan Cheng

Keyword(s):

Signal Processing ◽

Signal Detection ◽

Transform Domain ◽

Linear Canonical Transform ◽

Nonstationary Signal ◽

Linear Frequency ◽

Simulation Results ◽

Definition Of ◽

Linear Frequency Modulated Signal

The linear canonical transform is shown to be one of the most powerful tools for nonstationary signal processing. Based on the properties of the linear canonical transform and the classical Wigner-Ville transform, this paper investigates the Wigner-Ville distribution in the linear canonical transform domain. Firstly, unlike the classical Wigner-Ville transform, a new definition of Wigner-Ville distribution associated with the linear canonical transform is given. Then, the main properties of the newly defined Wigner-Ville transform are investigated in detail. Finally, the applications of the newly defined Wigner-Ville transform in the linear-frequency-modulated signal detection are proposed, and the simulation results are also given to verify the derived theory.

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Target strength measurement of Caroun croaker (Johnius sp.) and acoustic fish density estimation in Musi Estuary, South Sumatra

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/944/1/012008 ◽

2021 ◽

Vol 944 (1) ◽

pp. 012008

Author(s):

F Supriyadi ◽

I Jaya ◽

S Pujiyati ◽

T Hestirianoto ◽

Z Fahmi

Keyword(s):

Survey Design ◽

Economic Value ◽

Acoustic Pulse ◽

Target Strength ◽

Estuarine Fish ◽

Fish Length ◽

Acoustic Survey ◽

Strength Measurement ◽

Fish Stocks ◽

Length Relationship

Abstract Caroun Croaker ( Johnius sp.) is one of the dominant estuarine fish that has a reasonably high economic value. The target strength (TS) value measurement is essential in calculating the density of fish stocks using the hydroacoustic method. Target strength measurement of Caroun Croaker (Johnius sp.) and an acoustic survey in Musi Estuary Waters of South Sumatra Province was conducted in December 2019. The result of TS measurement will be used to estimate the acoustic density along the survey area. The TS measurement used the standard tethered method, tying placing the fish in a fixed cage, transmitting the acoustic pulse, and analyzing its return using the scientific acoustic instrument Biosonic DT-X 200 KHz. The fisheries acoustic survey was carried out in the area around the Musi estuary with a predetermined survey design. The results of the measurements have obtained the TS-length relationship, as TS= 20 LOG L-78.79 with determinant value of R2= 0.67 for fish length ranges from 18.1-23.3 cm, and an acoustic survey showed that the estimated stock density value was 286 kg/ha for the total surveyed area of 1.612 ha.

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