Figure 3.

(A–H) Performance of bats in a series of different jitter experiments with two-point spacings of 0 μs, 10.6 μs, 5.3 μs, 4.0 μs, 2.7 μs, and 1.3 μs. (Each experiment as in Fig. 1B; successive experiments as in Fig. 1C.) Curves in each plot trace percentage errors in 40–60 trials as function of delay of single jittering echo a relative to delay of echo b₁ (i.e., Δt) regardless of spacing between b₁ and b₂. Data points are filled circles for bat 3, filled squares for bat 4, and filled triangles for bat 5 (13). Vertical crosshatched bars mark locations of echoes b₁ and b₂ relative to delays of a in each experiment. Curves contain separate error peaks for b₁ and b₂ until two-point spacing declines to 1.3 μs, where only one error peak is present (see text). Three different plots show 1.3-μs performance curves for different relative amplitudes of b₁ + b₂ (F, −4.0 dB; G, −4.2 dB; H, −4.3 dB).