{"id":23536,"date":"2017-01-20T09:23:16","date_gmt":"2017-01-20T13:23:16","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=23536"},"modified":"2017-01-20T09:23:16","modified_gmt":"2017-01-20T13:23:16","slug":"in-sweden-ambulances-testing-system-to-jam-car-radios","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/01\/in-sweden-ambulances-testing-system-to-jam-car-radios\/","title":{"rendered":"In Sweden, Ambulances testing system to jam car radios"},"content":{"rendered":"

\"\"<\/a><\/p>\n

(Source: BBC News<\/a> via Richard Langley)<\/p>\n

Ambulances in Stockholm are testing a system that interrupts in-car audio systems to warn drivers that they need to get through.<\/strong><\/p>\n

The solution was developed by students at the KTH Royal Institute of Technology in the city.
\nIt broadcasts a voice warning, while a text message also appears in the radio display.<\/p>\n

It uses an FM radio signal to jam drivers’ speakers and stop music playing.<\/p>\n

It will only be able to alert cars that have their radios turned on. It can also interrupt CDs and music connected via Bluetooth.<\/p>\n

The radio transmission is sent from the emergency vehicle to nearby FM tuners that are equipped with RDS, a communications protocol for embedding small amounts of digital information in FM radio broadcasts. It is most commonly used to display the station or song title.<\/p>\n

[…]The city will begin testing the system in a limited number of ambulances and fire engines, with plans to expand across the country later this year.<\/p>\n

The warning system can work out how far in advance messages need to be heard depending on the speed of traffic.<\/p><\/blockquote>\n

Continue reading at BBC News…<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

(Source: BBC News via Richard Langley) Ambulances in Stockholm are testing a system that interrupts in-car audio systems to warn drivers that they need to get through. The solution was developed by students at the KTH Royal Institute of Technology in the city. It broadcasts a voice warning, while a text message also appears in […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3781,3],"tags":[1584,1549,3488],"class_list":["post-23536","post","type-post","status-publish","format-standard","hentry","category-fm","category-news","tag-fm","tag-jamming","tag-sweden"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-67C","jetpack-related-posts":[{"id":17264,"url":"https:\/\/swling.com\/blog\/2016\/02\/sweden-again-rejects-dab\/","url_meta":{"origin":23536,"position":0},"title":"Sweden (Again) Rejects DAB","author":"Robert Gulley","date":"February 6, 2016","format":false,"excerpt":"Digital Radio FM Europe blog is reporting Sweden wants to keep FM radio: Parliament Confirms Rejection of DAB Radio in Sweden [updated] Public radio continues on FM and will push for extending its remit to include digital radio online. The Constitutional Standing Committee (KU) in Riksdagen (the Parliament) has processed\u2026","rel":"","context":"In "FM"","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"Degen-DE27","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Degen-DE27-e1438270294366.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Degen-DE27-e1438270294366.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/07\/Degen-DE27-e1438270294366.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":2296,"url":"https:\/\/swling.com\/blog\/2011\/12\/silabs-brings-shortwave-to-car-radios\/","url_meta":{"origin":23536,"position":1},"title":"SiLabs brings shortwave to car radios","author":"Thomas","date":"December 3, 2011","format":false,"excerpt":"Silicon Labs, a manufacture of DSP (Digital Signal Processing) chips that are in many of the shortwave radios we feature here on SWLing.com, is now taking their technology to car radios. They have announced the\u00a0Si476x chip family which features\u00a0AM\/FM, longwave, shortwave (SW), NOAA weather band, FM RDS decoding and AM\/FM\u2026","rel":"","context":"In "Manufacturers"","block_context":{"text":"Manufacturers","link":"https:\/\/swling.com\/blog\/category\/manufacturers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2011\/07\/silabslogo.gif?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":65219,"url":"https:\/\/swling.com\/blog\/2026\/01\/how-removing-am-and-fm-from-cars-impacts-the-12-volt-ecosystem\/","url_meta":{"origin":23536,"position":2},"title":"How Removing AM and FM from Cars Impacts the 12-Volt Ecosystem","author":"Thomas","date":"January 20, 2026","format":false,"excerpt":"Many thanks to SWLing Post contributor Dennis Dura, who shares this CE Outlook article examining the trend of major automakers removing AM\/FM radios from new vehicles and what it means for the 12-volt ecosystem. With AM\/FM being increasingly omitted in favor of digital monthly subscriptions and mobile-connected audio services, this\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/Truck-Car-Radio-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/Truck-Car-Radio-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/Truck-Car-Radio-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/Truck-Car-Radio-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/Truck-Car-Radio-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":5468,"url":"https:\/\/swling.com\/blog\/2013\/01\/daves-fm-station-empire\/","url_meta":{"origin":23536,"position":3},"title":"Dave’s FM station empire","author":"Thomas","date":"January 27, 2013","format":false,"excerpt":"Dave Schmarder (N2DS) enjoys making radios and featuring them on his website,\u00a0http:\/\/makearadio.com. What you may not know is that he also runs his own FM stations empire...and you can too: I thought your visitors might be interested in my FM stations empire.\u00a0I bought a bunch of mp3 players with built\u2026","rel":"","context":"In "Articles"","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"FMMegaplex","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2013\/01\/FMMegaplex-300x150.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":56495,"url":"https:\/\/swling.com\/blog\/2023\/05\/guest-post-review-of-an-affordable-compact-dab-portable-radio\/","url_meta":{"origin":23536,"position":4},"title":"Guest Post: Review of an affordable, compact DAB+ portable radio","author":"Thomas","date":"May 3, 2023","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mangosman, who shares the following review: DAB+ digital audio\/FM receiver and Bluetooth Audio Player with 2.4 inch LCD Display\u00a0 by Mangosman Digital Audio Broadcasting with improved audio compression and error correction is called DAB+. I have had this radio for a few years. Retail\u2026","rel":"","context":"In "Digital Audio Broadcasting"","block_context":{"text":"Digital Audio Broadcasting","link":"https:\/\/swling.com\/blog\/category\/digital-audio-broadcasting\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":17764,"url":"https:\/\/swling.com\/blog\/2016\/03\/car-shortwave-radio\/","url_meta":{"origin":23536,"position":5},"title":"Car Shortwave Radio","author":"Robert Gulley","date":"March 11, 2016","format":false,"excerpt":"Tonight on Allan Weiner Worldwide (WBCQ\u00a0 7490 kHz coming in beautifully on my FRG-7) Allan mentioned a shortwave radio converter for car radios. The package uses a small box which plugs into the cigarette lighter socket and can either use an antenna made for the converter or an antenna supplied\u2026","rel":"","context":"In "Mobile Shortwave"","block_context":{"text":"Mobile Shortwave","link":"https:\/\/swling.com\/blog\/category\/mobile-shortwave\/"},"img":{"alt_text":"sw_car_audio","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/sw_car_audio.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/23536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=23536"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/23536\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=23536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=23536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=23536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}