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. 2015 Jan 8;10(1):e116136. doi: 10.1371/journal.pone.0116136

Figure 1. Descriptive analyses of orangutan clicks; a) Time series of an orangutan click bout.

Figure 1

Dark blue line indicates raw power spectra (dB), light blue line indicates acoustic amplitude envelop measure, and red line indicates inter-lip distance measure. b) Spectrographic representation; c) Average estimates of raw power spectra; d) Detrended power spectra; e) Coherence of orangutan clicks.