the.com/vocalization

means A sound produced by a creature's vocal organs — a cry, call, note, or utterance — used to communicate before anyone had a keyboard to avoid the problem entirely.

from Traces back to Latin 'vox' (voice), through 'vocalis' (sounding, speaking), the same root that gives us 'vowel' and 'vocal.' The '-ize' and '-ation' endings are later additions — workhorse Latin suffixes that turn a quality into an action and that action into a noun, bolted on as English kept manufacturing abstract nouns through the 17th-19th centuries. So the word is literally 'voice' dressed up in extra scaffolding to sound more clinical than 'shout.'