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. 2011 Mar 9;6(3):e17460. doi: 10.1371/journal.pone.0017460

Figure 3. Changes in the proportions of syllable types across postnatal development.

Figure 3

Each column shows proportions of most common syllables at the specified age. The proportions of the noisy syllable are not shown as it was only produced very rarely by adult mice, representing only 0.6% (44/6936) of syllables.