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Table 2 List of 11 acoustic parameters and their definitions

From: Nocturnal “humming” vocalizations: adding a piece to the puzzle of giraffe vocal communication

Acoustic parameters

Definition

F0 start (Hz)

Fundamental frequency at the beginning of the vocalization

F0 mid (Hz)

Fundamental frequency at the middle of the vocalization

F0 end (Hz)

Fundamental frequency at the end of the vocalization

F0 min (Hz)

Lowest fundamental frequency

F0 max (Hz)

Highest fundamental frequency

F0 range (Hz)

Difference between minimum and maximum fundamental frequency

F0 mean (Hz)

Arithmetic average frequency across a call

F0 median (Hz)

Central point from data points in ascending order of the F0 contour

Duration (s)

Time between onset to the end of call