Ключевые слова: adult, alert, amplifier, announce, attention, background, bullhorn, call, color, communication, copy, device, electric, equipment, green, hand, holding, horn, information, loud, loudspeaker, male, man, megaphone, modern, news, noise, person, portable, power, proclaim, promotion, public, shout, space, speak, speaker, text, voice, volume, warning, young,