Ключевые слова: activism, alert, amplifier, amplify, announcement, assembly, attention, audience, audio, battery powered, blur, broadcast, call out, call to action, campaign, communication tool, community, crowd, debate, discourse, electronic device, engagement, equipment, event, expression, focus, gathering, handheld, influence, information, informing, loudspeaker, megaphone, message, mob, noise, participation, protest, protestor, public event, public speaking, rally, society, sound, speaker, speech, street, urban, voice,