Ключевые слова: advertisement, advertising, alert, announce, announcement, arm, attention, audio, background, broadcasting, bullhorn, bullhorn megaphone, bullhorn speaker, business, communicate, communication, concept, design, device, electronic, hand, holding, horn, information, loud, louder, loudspeaker, media, megaphone, message, news, opinion, person, protest, red, sharing news, shout, shouting, sign, sound, speaker, speaking trumpet, speech, symbol, technology, trumpet, voice, volume, white, womens day,