Sound truck

{{Short description|Vehicle with loudspeakers used to broadcast messages}}

File:Taipei Taiwan Military-sound-truck-01.jpg]]

File:Buenos Aires vehículo con publicidad sonora.ogg

File:North Korea - Propaganda car (5015890642).jpg]]

A sound truck is a vehicle equipped with a public address system and loudspeakers, typically used to play recorded messages at high volume to the public while driving through residential areas. They are used in many countries by groups to disseminate political messages, such as by candidates during election campaigns, and in some countries for commercial advertising and promotion. They are also used by public safety authorities during emergencies, such as evacuations, to get information quickly to local populations. The use of sound trucks for advertising is illegal in many jurisdictions,{{Citation needed|date=August 2012}} and has been criticized as an example of attention theft.{{cite magazine |last1=Wu |first1=Tim |authorlink=Tim Wu |title=The Crisis of Attention Theft—Ads That Steal Your Time for Nothing in Return |url=https://www.wired.com/2017/04/forcing-ads-captive-audience-attention-theft-crime/ |access-date=9 August 2021 |magazine=Wired |date=April 14, 2017}} It is legal in Portugal and usually used during election campaigns by political parties.{{citation needed|date=December 2011}} It is also legal in Japan. For the legal situation in the United States see Saia v. New York (1948) and Kovacs v. Cooper (1949). In Bagé, Rio Grande do Sul, Brazil, the level of the sound cannot exceed 65 decibels.{{cite web|url=http://www.jornalminuano.com.br/noticia.php?id=67479&data=&volta=|title=Prefeitura atua na fiscalização de carros de som no centro da cidade|author=Melissa Louçan|date=2011-10-11|access-date=2011-12-23|work=Minuano Online|language=pt|url-status=dead|archive-url=https://web.archive.org/web/20120426070827/http://www.jornalminuano.com.br/noticia.php?id=67479&data=&volta=|archive-date=2012-04-26}}