An electropalatographic and electroglottographic study on domain-initial strengthening in Korean

The current paper presents the articulatory and acoustic results of domain-initial strengthening in Korean language. The simultaneous electropalatographic, electroglottographic, and acoustic signals were recorded and temporally adjusted for alignment. The peak linguopalatal contact, seal duration, contact quotient (CQ) were measured for six Korean consonants at the initial position of five boundary types. The acoustic measures included voice onset time and the difference between the first two harmonics (H1-H2). Results have shown that the positional property of a segment does affect its supralaryngeal and laryngeal configurations. From the supralaryngeal aspect, more forceful articulatory magnitude and longer seal duration is applied when the segment is placed at stronger position. Fricatives are resistant to the boundary effect on the supralaryngeal configuration. For the laryngeal configuration, it is found that the vocalic segment following the test consonants have lower CQ at higher boundary. However, the acoustic correlates of this decreased glottis closure is not clearly shown.