A bullhorn, also called a megaphone, has long been used at protests, sports events, film sets and public gatherings to project a voice across a crowd, and that familiar amplified tone is why the effect reads instantly in videos. Online, creators have adopted the generic bullhorn sound as a shorthand for authority, urgency and comic overreaction, dropping it into memes, gaming clips, reaction videos and short edits whenever a moment needs to feel announced rather than simply said. Its short length and punchy delivery keep it useful for quick cuts and social clips.