Figure 3.

Spectral Characteristics of the Vocalizations. Mean duration, peak frequency, fundamental frequency, and peak amplitude for WT and KO mice on PD 8 and PD 11. Male KO mice on PD 8 emitted calls of a shorter mean duration (a), and a lower mean peak amplitude (d) than male WT mice. Female KO mice on PD 8 emitted calls at a higher mean peak frequency (b), a lower fundamental frequency (c), and a lower mean peak amplitude (d) than WT females. Male KO mice on PD 11 emitted USVs of a shorter mean duration (e), higher mean peak frequency (f), higher mean fundamental frequency (g), and a lower mean peak amplitude (h) than WT males. Female KO mice on PD 11 emitted calls of a shorter mean duration (e), higher mean peak frequency (f), and a higher mean fundamental frequency (g) than WT females. The bars represent the mean and the error bars represent the standard error of the mean. * = p < .05; ** = p < .01; *** = p < .001