In case you were wondering, the babies do vocalize now and then, but not often.
From the scienceblogs.com
While all birds vocalize, for most of them these sounds are genetically hardwired.
From the sciencedaily.com
Cats often begin to vocalize more, and many guardians note a change in their voice.
From the sfgate.com
He'll expose his desires to the fullest extent and vocalize his primal urges.
From the chron.com
Nile Lechwes can visually signal and vocalize to communicate with each other.
From the en.wikipedia.org
Scientists have long thought mice might be a model for how humans learn to vocalize.
From the sciencedaily.com
Young birds, and young humans, make a lot of big mistakes as they learn to vocalize.
From the sciencedaily.com
Ms. Giffords is not able to vocalize with the tube in place, doctors said.
From the online.wsj.com
As he has done consistently this season, Stoudemire made sure to vocalize his support.
From the newsday.com
More examples
Voice: utter with vibrating vocal chords
Sing (each note a scale or in a melody) with the same vowel
Pronounce as a vowel; "between two consonants, this liquid is vowelized"
Articulate: express or state clearly
Utter speech sounds
(vocalization) voice: the sound made by the vibration of vocal folds modified by the resonance of the vocal tract; "a singer takes good care of his voice"; "the giraffe cannot make any vocalizations"
(vocalization) utterance: the use of uttered sounds for auditory communication
(vocalizing) singing: the act of singing vocal music
To express with the voice, to utter; To produce noises or calls from the throat; To sing without using words; To turn a consonant into a vowel; To make a sound voiced rather than voiceless