Acoustic parameters (X̅ ± SE) measured for the analysis of the entire full spectrum of simple 1-note calls and of the principal carrier of simple 1-note calls produced by male (<i>N</i> = 14) and female (<i>N</i> = 12) subjects after interacting with a stimulus hamster of the opposite sex.

a 1st quartile frequency b 3rd quartile frequency c difference between the upper and lower frequency limits of the selection d inter-quartile range bandwidth e filtered root-mean-square amplitude. f Statistical comparisons made by two-group Kruskal-Wallis test Acoustic parameters (X̅ ± SE) measured for the analysis of the entire full spectrum of simple 1-note calls and of the principal carrier of simple 1-note calls produced by male (N = 14) and female (N = 12) subjects after interacting with a stimulus hamster of the opposite sex.