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. 2006 Nov 28;274(1609):479–488. doi: 10.1098/rspb.2006.3744

Figure 1.

Figure 1

Modifications of female Xenopus laevis calls in the frequency domain. (a) Spectrogram (top, amplitude in colour scale; dynamic range, 35 dB; window size, 2048 points; filter bandwidth, 20 Hz) and oscillogram (bottom) of a natural rapping call. (b) Oscillogram (left) and power spectrum (right, window size, 2048 points) of a natural female click, (c) a synthetic female click, (d) a synthetic male click, (e) a filtered white noise click and (f) a broadband white noise click, used to build experimental modified calls.