Ключевые слова: acoustic, advertisement, advertising, alert, amplifier, announce, announcement, attention, audio, background, broadcast, broadcasting, bullhorn, business, caucasian, closeup, communicate, communication, cropped, electronic, equipment, gesture, guy, hand, loudspeaker, male, man, media, megaphone, message, millennial, modern, news, orange, panorama, person, promotion, protest, sale, shouting, speaker, speech, stereo, system, technology, unrecognizable, volume, warning, young,