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An interval signal, or tuning signal, is a characteristic sound or musical phrase used in international broadcasting and by some domestic broadcasters, played before commencement or during breaks in transmission, but most commonly between programmes in different languages. It serves several purposes: * It assists a listener to tune his or her radio to the correct frequency of the station. This is because most older and cheaper radio receivers do not have digital frequency readout. * It informs other stations that the frequency is in use. * It serves as a station identifier even if the language used in the subsequent broadcast is not one the listener understands. The practice began in Europe in the 1920s and 1930s and was carried over into shortwave broadcasts. The use of interval signals has declined with the advent of digital tuning systems, but has not vanished. Interval signals were not required on commercial channels in the USA, where jingles were used as identification. == Broadcasting services and interval signals == * BBC World Service: ''Bow Bells'' (English programme), three notes tuned B-B-C (non-English programme, non-Europe), four notes tuned B-B-B-E (non-English programme, to Europe). * China National Radio, China Radio International: Chime version of ''义勇军进行曲'' ("March of the Volunteers"). * Voice of the Strait News Radio: Bell version of ''三大纪律八项注意'' ("Three Rules of Discipline and Eight Points for Attention"). * Deutsche Welle: Piano version of ''Es sucht der Bruder seine Brüder'' from Fidelio by Ludwig van Beethoven. * Radio Australia: Chimes version of ''Waltzing Matilda'' (chorus). * Radio Belarus: ''Radzima maja darahaja'' ("My dear Motherland"). * Radio Canada International: First four notes of ''O Canada'', played on piano or autoharp. * Radio France Internationale: Electronic-disco, culminating in the last 8 measures of ''La Marseillaise''. * Radio Japan: ''Kazoe-uta'' (Japanese counting song), ''さくら さくら'' ("Sakura Sakura" - Cherry Blossoms). * KBS World Radio: ''Dawn''. * Radio Habana Cuba: Melody of the ''La Marcha del 26 de Julio'' ("March of the 26th of July"). * Radio Netherlands: Chime version of the Eighty Years' War song ''Merck toch hoe sterck''. * Radio New Zealand International: The call of a New Zealand bellbird. * Radio Republik Indonesia: ''Rayuan Pulau Kelapa'' ("Solace on Coconut Island"), composed by Ismail Marzuki. * RTÉ Radio 1: Chime version of ''O'Donnell Abú'' ("O'Donnell Forever").〔()〕 * Radio Slovenia: Electronically generated cuckoo chirping. * Radio Sweden: Chime version of ''Ut i vida världen'' ("Out in the Wide World"), composed by Ralph Lundsten.〔(Radio Sweden interval signal ) Retrieved 2011-11-24.〕 * Radio Ukraine International: ''Reve ta stohne Dnipr shyrokyi''. * Vatican Radio: ''Christus Vincit'', played on flute. * Voice of America: Brass band version of ''Yankee Doodle''. * Voice of Korea: Melody of ''김일성장군의 노래'' ("Song of General Kim Il-sung"). * Far East Broadcasting Company: ''Lord Jesus to Save Sinners''. * Ö1: Three notes tuned O-R-F, played on viola. * RTL Radio: ''Feierwon'' by Michel Lentz, played on chimes.〔http://www.radioforen.de/index.php?threads/pausenzeichen-und-ihre-musikalischen-quellen.21902/page-3〕 * DR P1: ''Drømte mig en drøm i nat'', played on xylophone.〔https://www.youtube.com/watch?v=lpDQYdoIQ0w〕 * Polish Radio External Service: Excerpt from ''Prząśniczka'' by Stanisław Moniuszko, played on piano.〔https://www.youtube.com/watch?v=ztH0_2ueIYc〕 * Voice of Mongolia: ''Эх орон'' ("Motherland"). * Trans World Radio: ''What a friend we have in Jesus''. * Radiodifusión Argentina al Exterior: First eight notes of ''Mi Buenos Aires querido'' by Carlos Gardel. * Radio Nacional de Venezuela - Canal Internacional: Beginning of ''Alma Llanera'' by Pedro Elías Gutiérrez and Rafael Bolívar. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「interval signal」の詳細全文を読む スポンサード リンク
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