Preboundary lengthening of alveolar consonants: Acoustic and articulatory evidence from Seoul Korean
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초록
This study investigates the effects of prosodic boundaries on the acoustic and articulatory realization of alveolar consonants [n] and [t] in Seoul Korean. The ultrasound analysis shows that a higher prosodic boundary results in a greater magnitude of temporal and spatial expansion for the consonant gestures of Korean alveolars: when located in an IP-final compared to an AP-final position, [n, t] exhibit a significant lengthening, an advancement of the tongue root and lowering of the tongue body. We suggest that these acoustic and articulatory strategies variously employed among Korean speakers have a shared goal of expanding a pharyngeal cavity that often serves as the articulatory goal across world's languages when the target segment is temporally and/or spatially expanded. This study lends support to the cross-linguistic patterns of boundary-induced strengthening and contributes novel articulatory evidence demonstrating that consonantal gestures located at the right-edge are structurally conditioned by prosodic hierarchy in Korean. The findings of this study also illuminate how the preboundary lengthening of consonant gesture in Korean is articulatorily implemented.
Abstract
This study investigates the effects of prosodic boundaries on the acoustic and articulatory realization of alveolar consonants [n] and [t] in Seoul Korean. The ultrasound analysis shows that a higher prosodic boundary results in a greater magnitude of temporal and spatial expansion for the consonant gestures of Korean alveolars: when located in an IP-final compared to an AP-final position, [n, t] exhibit a significant lengthening, an advancement of the tongue root and lowering of the tongue body. We suggest that these acoustic and articulatory strategies variously employed among Korean speakers have a shared goal of expanding a pharyngeal cavity that often serves as the articulatory goal across world's languages when the target segment is temporally and/or spatially expanded. This study lends support to the cross-linguistic patterns of boundary-induced strengthening and contributes novel articulatory evidence demonstrating that consonantal gestures located at the right-edge are structurally conditioned by prosodic hierarchy in Korean. The findings of this study also illuminate how the preboundary lengthening of consonant gesture in Korean is articulatorily implemented.
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