police megaphone

• bullhornPortable voice amplification device
• loudspeakerSound amplification device
• announcementPublic declaration of information
• crowdLarge public gathering
• protestPublic expression of disapproval

riot · authority · amplified · voice · dispersal · warning · siren · standoff · barricade · command · broadcast · static · crackle · orders · demonstration · hostage · negotiator · SWAT