This study looks into interaction between the quasi-phonemic\ud vowel length contrast in Scottish English and its word-prosodic\ud system. We show that under the same phrasal accent the\ud phonetically short vowels of the morphologically conditioned\ud quasi-phonological contrast are produced with significantly\ud more laryngeal effort (spectral balance) than the long ones, while\ud the vowels do not differ in quality, overall intensity or\ud fundamental frequency. This difference is explained by\ud employing the concept of “functional load”. Duration must be\ud kept short to mark the short vowel length, while both word-stress\ud and phrasal accent require lengthening. Therefore, the additional\ud laryngeal effort in the short vowels serves a\ud prominence-enhancing function. This finding supports the\ud hypothesis proposed by Beckman that phonological categories\ud of word-prosodic systems featuring “stress-accent” are not\ud necessarily phonetically uniform language-in
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