Linking low frequency hearing to the cochlea's curvature

The figure at the top shows how the base and apex radii of the cochlea were determined. The graph at the bottom illustrates the link between the radii ratio and the low frequency hearing limit of a number of species: ms1 and ms2 are two strains of mice; ra1 and ra2 are two species of rat; bd is the bottlenose dolphin; sl is the sea lion; sm is the squirrel monkey; ca is the cat; ch is the chinchilla; gb is the gerbil; gp is the guinea pig; h is the human; e is the elephant; cw is the cow. Courtesy of the Proceedings of the National Academy of Sciences