Cooing and babbling refer to first speech sounds of the infant. Here, cooing is
1
the form of language adopted by adults when speaking to infants and toddlers.
2
pleasant vowel-like noises made by infants beginning around 2 months.
3
repetition of consonant-vowel combinations in long strings, beginning around six months of age.
4
short sentences with high pitched exaggerated intonation spoken by adults.