Ключевые слова: alarm, alert, amplifier, announce, announcement, attention, audio, broadcasting, bullhorn, button, cartoon, cloud, color, communicate, communication, concept, conceptual, design, emergency, equipment, graphic, icon, illustration, internet, loud, loudspeaker, mail, media, megaphone, message, music, mute, noise, notify, object, person, power, scream, shout, shouting, sign, siren, sound, speak, speaker, speech, symbol, talking, urgent, warning,