a striking blue megaphone pops against a sunny yellow backdrop, drawing attention with its bold

megaphone sound speak call loud blue bright bold callout yell cheer alert tone voice pop fun clear artsy show sign speakup buzz fanfare coach loudspeakers shout burst brightyellow focus audio soundwave design vibe graphic vivid event tech message talk color joy loudsound striking pops sunny yellow backdrop drawing attention stands background creating lively eyecatching visual visual