Ключевые слова: advertisement, alert, amplifier, announce, arm, attention, audio, background, blue, broadcasting, bullhorn, business, closeup, communicate, concept, device, empty, equipment, female, hand, hold, horn, information, loud, loudspeaker, manager, marketing, megaphone, message, news, noise, object, person, portable, proclaim, promotion, public, red, shouting, sound, speak, speaker, speech, symbol, voice, volume, warning, white, woman, work,