Spectrograms of typical call types produced by golden hamsters after interacting with a stimulus hamster of the opposite-sex.

Call subtypes are merged into 8 major categories of call types: A. Flats (Flat^1–3, 2tail-flat⁴), B. Waves (Wave down-up¹, Wave up-down², Complex wave³), C. Humps (Center hump¹, Left hump², Right hump³), D. Chevrons (Chevron-down¹, Chevron-up²), E. Sweeps (Down-sweep¹, Up-sweep²), F. Broadband, G. 1-Frequency jump (1-Jump up¹, 1-Jump down²), H. Multi-Frequency jumps (2-Step¹, 3+Step²).