Bat sonar examples
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See High resolution analysis for more details.
Frequency cursors in kHz appear at the left-hand side; screen width in milliseconds is shown in green at the bottom right-hand corner, and DFT sample size in the moddle (in green). Signal amplitude is plotted in grey along the top of the screen.
pulse, < 1ms duration, from a feeding buzz
social calls - note very complex harmonics
Pipistrellus pygmaeus; these high frequencies are not uncommon
Overlapping calls - Daubenton's call reflected off water surface
Myotis daubentonii
Myotis daubentonii; fairly clear despite gross interference
distinct plots despite overlapping calls
Rhinolophus hipposideros; fundamental & 3 harmonics
Rhinolophus ferrumequinum; suppressed fundamental at 41 kHz
Rhinolophus blasii
Kerivoula hardwickii
Myotis natterii
Myotis leibii
Myotis lucifugus
Myotis bechsteinii