Ключевые слова: alarm, announcement, broadcast, communication, contact antenna, disaster, disaster broadcasting, disaster information, disaster management administrative radio, disaster prevention, disaster prevention radio, disaster prevention speaker, disaster radio, earthquake disaster earthquake, earthquake warning, emergency, evacuation, evacuation directive, evacuation drills, evacuation recommendation, expansion speaker, facilities, facility, government, guide, information, information broadcasting, loudspeaker, megaphone, natural calamity flood damage, natural disasters, notice, public, public communication, safety measure, scheduled chime, siren, speaker, town broadcasting, tsunami warning, vigilance, warning, wireless,