Ключевые слова: address, advertisement, alert, amplifier, announce, announcement, attention, audio, background, broadcast, bullhorn, calling, communication, electric, horn, information, loud, loudspeaker, megaphone, message, metal, music, news, nobody, object, old, outdoor, pa, phone, power, public, shout, siren, sound, speak, speaker, symbol, system, talk, technology, tell, urban, vintage, voice, volume, wall, warning, white, wire,