Scientific applications

Multifrequency echo sounder operation

Echogram examples:

Krill

The echograms on this page show a recording of a layer of krill using 18, 38, 70, 120 and 120 kHz. As opposed to the mackerel, the strongest echo from krill is obtained at 70 kHz. The frequency responses of mackerel and krill are clearly different and can be used to identify and discriminate these species.

Simrad


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