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. Author manuscript; available in PMC: 2017 Oct 27.
Published in final edited form as: J Physiol Paris. 2016 Oct 27;110(3 Pt B):200–215. doi: 10.1016/j.jphysparis.2016.10.005

Fig. 11.

Fig. 11

Contribution of waveform complexity (F2-F1, A,B; F3-F1, C,D) to sum chirp conspicuousness of natural chirps on 10 Hz beats (A,C) and 100 Hz beats (B,D) (20-ms analysis window). Both waveform variables were significant contributors to sum chirp conspicuousness (F2-F1 partial correlation: −0.25, p<0.0001; F3-F1 partial correlation: −0.22, p=0.0002). Chirps that naturally occur on more sinusoidal waveforms (more negative values of F2-F1) were more conspicuous. Chirps with lower values of F3-F1 were also more conspicuous. These trends appear to be driven largely by the high-frequency, long duration and/or multi-peaked chirps of P. hasemani and A. devenanzii, which naturally occur on waveforms of intermediate complexity, as well as the big and small chirps of A. albifrons.