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. 2017 Oct 12;12(10):e0185733. doi: 10.1371/journal.pone.0185733

Fig 2. Single screams (wavering screams and whines) produced in different behavioural contexts.

Fig 2

Upper panel: wavering screams produced in (a) alarm (Cocha Sandoval), (b) begging (Zoo Duisburg) and (c) isolation (Cocha Tres Chimbadas). Lower panel: whines produced in (d) alarm (Cocha Cashu), (e) begging (Zoo Tierpark Hagenbeck) and (f) isolation (Cocha Sandoval). Spectrograms show frequency over time and were generated using a 1024-point FFT and a Hann window with 75% overlap. Oscillograms show amplitude as pressure changes over time. The audio files of the vocalizations depicted in (a-f) are provided in the supporting information (S2–S7 Audios).