Effects of Noise and Absorption on High Frequency Measurements of Acoustic-Backscatter from Fish

Figure 6

Universal diagram of echosounder performance for multiple echoes. The SNR for a multiple echo (TS = −40 dB, fish/m³, and = −50 dB) is plotted as a function of frequency for parameters of range, , transducer radius, , and beam width, Θ, as shown in 400 m range panel. Roughly appropriate regions are shaded.