Ключевые слова: advertisement, amplifier, announce, announcement, announcement message, attention, audio, background, broadcasting, bullhorn, color image, communication, cut out, discussion, equipment, horizontal, horn, icon, idea, illustration, information equipment, isolated, loud, loudspeaker, megaphone, message, microphone, music, news, no people, noise, object, plastic, public, red, screaming, shout, shouting, simplicity, single object, sound, speaker, speech, talk, talking, threedimensional, voice, white, white background,