Sawashima M, Hirose H, Yoshioka H, Kiritani S
Phonetica. 1982;39(4-5):188-98. doi: 10.1159/000261662.
In order to investigate the interaction between articulatory and vocal pitch controls, EMGs of the cricothyroid (CT) and sternohyoid (SH) muscles were recorded during utterances of two-mora Japanese words with rising and falling accent types in the Tokyo dialects. The test words consisted of combinations of open and closed vowels. It was revealed that the changes in CT activity were consistently observed in correspondence with the F0 shift according to the accent types, while the SH muscle was observed to be active both for jaw opening and F0 lowering, with some subject-to-subject difference. It was also observed that the time lag between the decrease in CT activity and the F0 fall varied with a shift in the relative timing of SH activity in one subject, but not in the other. Articulatory jaw opening with SH activation was considered to positively contribute to F0 lowering, but the use of this mechanism appeared to be optional at least in the Tokyo accent.
为了研究发音控制与音高控制之间的相互作用，在说出东京方言中具有升调和降调重音类型的双音节日语单词时，记录了环甲肌（CT）和胸骨舌骨肌（SH）的肌电图。测试单词由开元音和闭元音的组合组成。结果显示，根据重音类型，CT活动的变化与F0的变化始终一致，而观察到SH肌肉在张口和F0降低时均有活动，个体之间存在一定差异。还观察到，在一名受试者中，CT活动降低与F0下降之间的时间滞后随SH活动相对时间的变化而变化，而在另一名受试者中则没有。SH激活引起的发音性张口被认为对F0降低有积极作用，但至少在东京口音中，这种机制的使用似乎是可选择的。
