Echo voltage reflected by turtle on various angles

(1) * Sunardi Sunardi Mail (Universitas Ahmad Dahlan, Indonesia)
(2) Anton Yudhana Mail (Universitas Ahmad Dahlan, Indonesia)
(3) Azrul Mahfurdz Mail (Polytechnic Sultan Haji Ahmad Shah, Malaysia)
(4) Sharipah Salwa Mohamed Mail (Universiti Malaysia Pahang, Malaysia)
*corresponding author


This research proposes the acoustic measurement by using echo sounder for green turtle detection of 1 year, 12 and 18 years. Various positions or angles of turtles are head, tail, shell, lung, left and right side. MATLAB software and echo sounder are used to analyse the frequency and the response of the turtle as echo voltage and target strength parameter. Based on the experiment and analysis have been conducted, the bigger size of the turtle, the higher echo voltage and target strength. The target strength of turtle for lung and shell for all ages are -26.52 dB and –26.17 dB respectively. The target strength of turtles in this research is different with target strength of fish in our previous research. Therefore, for future research, the repellant system based on differences of target strength the turtle and fish for avoided the turtle trapping in the net can be implemented to protect the population of turtle from extinction


Echo sounder; Echo voltage; Target strength; Green turtle; Fish



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International Journal of Advances in Intelligent Informatics
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