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A Hierarchical Neuronal Model for Generation and Online Recognition of Birdsongs

Figure 6

The sound wave and sonogram of a generated song.

We plugged the air sac pressure () and stiffness () parameters obtained from the first level output of the generative model (Figure 5C) into the syrinx equations (4). A) The solution of the syrinx equations, i.e. in Eq. (4), arbitrary units. The mini-breaths where no phonation is produced can be clearly observed. B) The sonogram of the soundwave in A (time (sec) vs. frequency (Hz)) is given with a sampling frequency of 12000 Hz. The first ∼3 sec of this sonogram can also be viewed in separate chunks in Figure 3.

doi: https://doi.org/10.1371/journal.pcbi.1002303.g006