The Voice of Bats: How Greater Mouse-eared Bats Recognize Individuals Based on Their Echolocation Calls
Figure 4
Normalized PSDs (mean and SEM) of the calls of bat 1 (black) and bat 3 (blue).
(A) The mean of all calls; (B) The mean of calls misclassified by the bats; (C) The mean of the 15 calls closest to the hyperplane; (D) The mean of the 15 calls farthest from the hyperplane. (E) Difference between the mean PSDs of bat 1 and bat 3 for the four groups of calls shown in A–D. (F) Linear correlation coefficients (a measure of similarity) between the curves presented in Figure 3E representing the difference between the average PSDs (Figure 3A–D).