monochromatic image features a paleblue speech horn against a backdrop of a paler blue during a social justice protest

blue megaphone loudspeaker speaker horn communication device protesting social justice movement pale background monochromatic palette rally demonstration activism voices change grassroots organizing public speaking audiovisual equipment sound amplification political protest cause advocacy mass freedom speech stand handheld microphone voicebox rallying cry loud clear unheard call action powerful message mobilization tool visual impact signs bold statement