Figure 4.

Shows the ranging accuracy for approach signals and search type signals in big brown bats, Eptesicus fuscus. Two bats were trained in a psychophysical experiment, using a Yes/No procedure in a phantom target simulator. When the echo was a short broadband approach signal the bats could determine echo delay with around 85 μs accuracy, corresponding to a range difference of 1.5 cm, whereas long narrow band search type signals as echoes resulted in a ranging accuracy 10 times as long, more than 800 μs or 15 cm.