喊話

to speak using a loud voice or megaphone etc / (fig.) to convey a strong message

to yell / to shout / to call out for (a person)

dialect / language / spoken words / speech / talk / words / conversation / what sb said / CL:種|种[zhong3],席[xi2],句[ju4],口[kou3],番[fan1]

to converse with sb by shouting from some distance away / (fig.) to say sth intended for the ears of sb who is not in one's presence (often, by making a public statement or by posting online)

megaphone