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. 2007 Jan 8;362(1479):355–367. doi: 10.1098/rstb.2006.1963

Figure 3.

Figure 3

Matched filters in auditory coding. (a) Conceptual example showing the relationship between the dominant frequency (DF) for (i) a noise-free call, (ii) a noisy call and the corresponding (iii) best excitatory frequency (BEF) in an auditory organ acting as a matched filter for the species-specific call; after Capranica & Moffat (1983). (b) Plot of DF and BEF for 36 species of anurans, from Gerhardt & Schwartz (2001). (c) Similar plot of nine species of grasshoppers, from Meyer & Elsner (1996).