Fig. 14 in Rediscovery of the enigmatic Madagascan endemic Belohina inexpectata Paulian, 1958, with notes on its morphology and phylogenetic position (Coleoptera, Scarabaeoidea: Belohinidae)

Fig. 14 – Sound production by Belohina inexpectata. A, Oscillogram (relative amplitude vs time) and spectrogram (time vs frequency vs relative amplitude) of five echemes. The spectrogram was based on a short-time Fourier transform with a sliding Hanning window (512 samples, 85% of overlap) and 30 dB dynamic range. A 200 Hz high-pass filter was applied before analysis. B, Detail (grey region of A) of a single echeme showing successive pulses. C, Detail (grey region of B) of four successive pulses showing elementary oscillations.