Ключевые слова: alert, announce, announcement, audio, background, black, broadcast, bullhorn, communicate, communication, concept, design, element, equipment, flat, graphic, icon, illustration, isolated, line, loud, loudspeaker, media, megaphone, message, microphone, modern, music, noise, object, outline, player, radio, record, set, sign, simple, sound, speak, speaker, speech, symbol, technology, voice, volume, warning, wave, web, white,