loudspeakers on a pole on the street of the city against the background of foliage

against background foliage audio megaphone outdoor pole public alarm alert announce announcement blue broadcast communication loud loudspeaker sound sky street system horn loudspeakers message shout siren soundsystem metal post speaker station city clouds day equipment europe russia safety security technology warning amplify announcements attention audible ayhan turan menekay ayhantm bullhorn caution commentate