Communicative functions of rhythm in spoken discourse - the case of radio broadcasting

Time is one of the most precious resources in the audio-visual media. Journalists working in radio broadcasting are particularly subject to time constraints. Their message has to be passed on by the speech signal in a few minutes or seconds without visual support of written text or pictures. Therefore, the message has to be structured in a way that the most important aspects of the information are made prominent and interesting for the audience. On the other hand, journalists have to keep in time and need strategies to orient themselves in time in order to achieve exact timing of their spoken discourse. In this article, I lend support to the notion that the rhythmic structure of speech is one of the major tools for journalists to succeed in this endeavor. First, I review some of the literature on the nature of speech rhythm and its role for speech perception, language acquisition, processing and interaction. Second, the state of the art about what we know about rhythmic prominence in radio broadcasting is given. Finally, the idea will be advanced that speech rhythm, sometimes in conjunction with gesture, improves timing and time estimation in journalists speaking on air. A rich set of literature from different domains is presented in order to identify major questions and pathways for future research on speech rhythm in radio broadcasting.