Although the ultrasonic calls are too high-pitched for the human ear to pick up, the love songs allow females to weigh up the most suitable father for their offspring.

尽管由于这发出的声音音频过高，人耳无法听到，然而这样的“歌声”却是为雌鼠提供了寻找最适合哺育后代对象的重要参考因素。