Ключевые слова: alert, amplifier, announcement, audio, broadcast, broadcasting, bullhorn, business, communicate, communication, concept, design, element, emergency, equipment, flat, graphic, horn, icon, illustration, isolated, line, linear, loud, loudspeaker, media, megaphone, message, microphone, modern, music, noise, object, radio, retro, sign, simple, sound, speak, speaker, speech, style, symbol, voice, volume, warning, wave, web, white,