Ключевые слова: advertisement, advertising, alarm, alert, amplifier, announce, announcement, attention, audio, broadcast, broadcasting, bullhorn, communication, emergency, equipment, horn, icon, information, internet, loud, loudspeaker, loudspeaker icon, marketing, media, megaphone, megaphone icon, message, microphone, news, noise, object, promotion, propaganda, public, radio, scream, shout, shouting, sign, sound, speak, speaker, speech, symbol, voice, volume, warning, web, website,