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. Author manuscript; available in PMC: 2015 Aug 7.
Published in final edited form as: J Exp Biol. 2013 Jul 1;216(Pt 13):2393–2402. doi: 10.1242/jeb.082321

Fig. 3.

Fig. 3

Envelope generated by the interaction of the EODs of three weakly electric fish. (A) Three fish that are not moving are shown in the inset. The magenta and orange lines indicate the constant distance of the two outer fish to the middle fish. The combined signal (black) is the sum of the EOD signals of the three fish, S1 (300 Hz), S2 (350 Hz) and S3 (395 Hz). The combined signal has an amplitude modulation (green) and a higher order envelope (red). (B) A Fourier analysis shows the power for each of the signals – the combined signal (black), the AM (green) and the envelope (red). (C) A close-up of B, highlighting the power at 5 Hz in the envelope due to our choice of EOD frequencies in this simulation.