Ключевые слова: alert, amplifier, announce, announcement, attention, audio, background, broadcast, broadcasting, business, communication, concept, design, equipment, hand, horn, icon, idea, information, isolated, loud, loudspeaker, marketing, megaphone, message, noise, object, organization, person, promotion, public, screaming, shouting, sign, social, sound, speak, speaker, speech, support, symbol, talking, vintage, voice, volume, warning,