Ключевые слова: 3d, 3d illustration, 3d rendering, advertisement, alert, announce, announcement, attention, audio, broadcasting, bullhorn, call, command, communication, discount, electric, electronic, equipment, horn, icon, isolated, loud, loudspeaker, media, mega, megaphone, message, object, plastic, power, promotion, public, red, render, shout, shouting, single, sound, speak, speaker, speech, symbol, technology, voice, volume, warning, white,