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. 2014 Feb 5;9(2):e88265. doi: 10.1371/journal.pone.0088265

Figure 1. Example of one spectrogram of an agonistic (a) and a greeting (b) croop call.

Figure 1

Spectrogram settings: FFT method, Gaussian window shape, window length  = 0.015 s, time steps  = 1000, frequency steps  = 250, dynamic range  = 70 dB.