Töne hoher Frequenz bei Mäusen

Summary The bank vole (Evotomys glareolus Schreb.) utters sounds of high frequency which are below or above the upper limit of audibility of man in order to get into contact with companions of the same species. Informative experiments prove thatPreyer's auricle reflex and a further reflex action (a short shrug of the dorsal skin) may equally be induced by sounds above the human limit of audibility Further experiments with an electroacoustic method are in preparation.