Fig. 13. Percentage of 501-T3 responses (either single-spike or multi-spike bursts) to vocalizations of different intensity ranges for pulses 3 ms and longer (purple circles) and pulses less than 3 ms (green circles). The numbers in parentheses indicate the number of vocalizations at each intensity (purple for pulses 3 ms or longer, green for pulses less than 3 ms). 501-T3 responds more reliably to longer bat vocalizations (durations of 3 ms or longer) at all intensities except those that are very loud (>90 dB pe SPL) or very quiet (<60 dB pe SPL).