Biosensors & Bioelectronics

Echo Processing and Identifying Surface and Bottom Layer with Simrad Ek/Ey 500

Abstract

Lubis MZ*, Wulandari PD, Mujahid M, Hargreaves J and Pant V

Simrad EK 500 Scientific 38-kHz and 120-kHz echo sounding system in the acoustics lab will be turned on during all scientific operations and should be monitored regularly for the presence of unusual acoustic signals or heavy fish sign. In the acoustic system, split beam processor is one of the acoustic devices that can help to echogram processing. The hardware required in the form of hardware, SIMRAD EK 500, and software, SIMRAD Echo EP 500. Processor 500 can be used for the calculation of the density of fish from fish or fish group. In echogram there are 12 scale color representing the image signal strength emitted by the object affected. Range Sa value on surface layer is -10 dB - (-4) dB, range Sv value on surface layer is 0 dB - (-89) dB, range Sa value on bottom layer is 15 dB - (-2) dB, range Sv value on bottom layer is -57 dB - (-74) dB. The total value Sa (dB) produces the extraction of data on surface layer using simple linear regression equation which produce y=0.0961x - 6.4388, R²=0.9159, with alpha value is 5, the results obtained shows the relationship between the value Sa obtained by looking at the percentage value that is 91%. In this paper the result there is a difference between the processing value Sa and Sv, where the value of Sv.