Acts 2:4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance. [kjv]
και επλησθησαν παντες πνευματος αγιου και ηρξαντο λαλειν ετεραις γλωσσαις καθως το πνευμα εδιδου αποφθεγγεσθαι αυτοις [gnt]
Romans 10:18 But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world. [kjv]
αλλα λεγω μη ουκ ηκουσαν μενουνγε εις πασαν την γην εξηλθεν ο φθογγος αυτων και εις τα περατα της οικουμενης τα ρηματα αυτων [gnt]
The ancient Greek word
"φθόγγος" ≈ "sound, utterance" and is the source of the English word "
diphthong" (two sounds together).
Some milk cow jokes could be uttered here, but that might be utter (udder) disaster.