Table 2:

Definitions of the 7 spectral and temporal features estimated from spectrograms of infant coppery titi monkey (Plecturocebus cupreus) trill vocalizations.

Parameter	Definition
Lowest Frequency (kHz)	Lowest frequency of the trill vocalization
Highest Frequency (kHz)	Highest frequency of the trill vocalization
Duration (s)	Duration of the trill vocalization
Bandwidth (kHz)	Difference between the lowest and highest frequency of the trill vocalization
Center Frequency (kHz)	Center frequency of the trill vocalization
Trill Count	Number of notes in the trill vocalization
Trill Rate	Number of notes divided by trill duration