Table 5.

Comparison of correlations between maximum fundamental frequency and other maximum acoustic features for vole vocalizations (n=23) and 6 month human infants (n=75). Correlation coefficients are shown below.

Acoustic variable	Infant	Vole
50% Bandwidth	.528**	.479*
Variance	.537**	.527*
Duration	.270*	.434*

^*Pearson correlation, p < 0.05

^**Pearson correlation, p < 0.01 (2 tailed).