Figure 1

Behavioral audiograms of prairie dog⁵², elephant⁵³, lemur⁵⁴, domestic cat⁵⁵, human psychoacoustial hearing threshold⁴, white-beaked dolphin⁵⁶ (smoothened data), false killer whale⁵⁷, from top to bottom, sorted by the curves’ minima. The full extension of the audiogram was not accessed in all cases. Reference sound pressure p ₀ = 20 μPa.