This article contributes to our knowledge about the prosodic realisation of rhetorical questions (RQs) as compared to information-seeking questions (ISQs). It reports on a production experiment testing the prosody of Englishwh-and polar RQs and ISQs in a Canadian variety. In previous literature, the contribution of prosody to the distinction between the two illocution types has often been limited to the intonational realisation of the terminus of the utterance, i.e. whether it ends in a rise or a fall. Along with edge tones, we tested other phonological and phonetic parameters. Our results are as follows: (i) The intonational terminus was distinctive only for polar questions (rise vs plateau), not forwh-questions (low throughout). (ii) Moreover, the semantic difference between RQs and ISQs is signalled by pitch accents. It is reflected in nuclear pitch accent type forwh-questions, and accent type and position for polar questions. (iii) Phonetically, RQs are produced with longer constituent durations and – forwh-questions – a softer voice quality in thewh-word. Taken together, several intonational categories and phonetic parameters contribute to the distinction between RQs and ISQs. A simple distinction between rising and falling intonation is in any case insufficient.
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