Fig. 1a (top) Time-pressure wave plot of th first 100 milliseconds of bonobo call.

Fig 1b (bottom) Spectrogram of that first 100 milliseconds of call.

(A spectrogram is a plot of the amount of energy (in black) present at various frequency bands (Hz) for that time period.)


Communication and language in primates (version 4/23/05) Here is an overview and summary.