You can refer to people's voices as a babble of sound when they are excited and confused, preventing you from understanding what they are saying. Kemp knocked loudly so as to be heard above the high babble of voices
If someone babbles, they talk in a confused or excited way. Momma babbled on and on about how he was ruining me They all babbled simultaneously `Er, hello, viewers,' he babbled
gibberish resembling the sounds of a baby to talk foolishly; "The two women babbled and crooned at the baby" utter meaningless sounds, like a baby, or utter in an incoherent way; "The old man is only babbling--don't pay attention
the first stage in the infants progress towards speech production, highlighted by the playful production of universally recognizable single-consonant and vowel-like sounds and repetitive syllable strings
babbles
Aussprache
Etymologie
[ 'ba-b&l ] (verb.) 13th century. Middle English babelen, probably of imitative origin.