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Fig. 10. Effects of loading the left tegmen. Spectrogram of songs of the same
specimen intact (A), after loading the the acoustic regions of the left tegmen
(B), following removal of the latex from the left tegmen (C) and after loading
the mirror of the right tegmen (D). Red arrows in AC indicate the same
frequency. Harmonic components decreased in frequency when the left tegmen was
loaded and recovered following removal of the latex. Loading of the right
tegmen eliminated the harmonic structure of the call. A segment of the
oscillogram at high resolution in every case is presented below each panel;
scale bar, 60 ms.