noun
sound truck; loudspeaker van; propaganda vehicle
A vehicle equipped with loudspeakers, used for political campaigning, commercial advertising, or right-wing propaganda. Often associated with noisy street-level broadcasts.
選挙の時期になると、街宣車が住宅街を回る。
During election season, sound trucks go around residential areas.
右
A right-wing group's propaganda vehicle was blaring a speech at high volume.