Figure 2 | Scientific Reports

Figure 2

From: Auditory thresholds compatible with optimal speech reception likely evolved before the human-chimpanzee split

Figure 2

Mean magnitudes of the external/middle ear transfer function (EMTF). (A) H. sapiens (blue), P. paniscus (green), P. troglodytes (red) and Pan (dashed orange). The y-axis has been reversed to allow comparisons with audiograms in Kojima30. (B) shows differences in mean magnitudes of the EMTF between humans and P. paniscus (red), humans and P. troglodytes (blue) and humans and panins (Pan; yellow). A similar plot was provided in Elder32 to compare audiograms. (A, B) Note that panins always show higher magnitudes than humans, except between 3.5 and 5.1 kHz.

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