Predictability is known to influence acoustic duration (e.g., Ibrahim et al. 2022) andprosodic factors such as accenting and boundary-related lengthening have beenpostulated to account for this effect (e.g., Aylett & Turk 2004). However, it hasalso been shown that other factors such as information status or speech stylescould contribute to acoustic duration (e.g. Baker & Bradlow 2009). This raises thequestion as to whether acoustic duration is primarily subject to the influence ofprosody that reflects linguistic structure including predictability. The current studyaddressed this question by examining the acoustic duration of word-final syllablesin polysyllabic words in DIRNDL, a German radio broadcast corpus (e.g. Eckartet al. 2012). We analysed polysyllabic words followed by an intermediate phraseor an intonational phrase boundary, with or without accenting, and with given ornew information status. Our results indicate that the acoustic duration of the word-final syllable was subject to the effect of prosodic boundary for long host words,in line with Aylett & Turk (2004); however, we also observed additional effects ofinformation status, log surprisal and accenting for short host words, in line withBaker & Bradlow (2009). These results suggest that acoustic duration is subjectto the influence of prosodic (e.g., boundary and accenting) and linguistic factors(e.g., information status and surprisal), and that the primacy of prosodic factorsimpacting on acoustic duration is further constrained by some intrinsic durationalconstraints, for example word length.