Noun
vocalisation (countable and uncountable, plural vocalisations)
Non-Oxford British English standard spelling of vocalization.
Females are in estrus about every four days, which is indicated by a reddening of genital areas, a musky smell, and a hissing, squeaking vocalisation she will emit if she believes a male is nearby. Source: Internet
This vocalisation can also be used at social meetings, during courtship, or in attempting to find another; the chirp of a mother searching for her cubs, which sounds more like the yelp of a dog than the chirp of a bird, can be heard up to convert away. Source: Internet
The "boom" vocalisation that cassowaries produce is the lowest frequency bird-call known and is at the lower limit of human hearing. Source: Internet