Study about Traces and Changes of Japanese Labial /h/ Sounds: An Analysis of Mouth Shape

在东北方言中有日语唇音/h/的痕迹，但下降也很明显。本研究试图通过捕捉口型的变化来接近实际情况，而不仅仅将其视为语音特征。以下的事情主要是由于现场调查而变得清楚的。- 虽然典型的双唇擦音仍保留在方言中，但从口型分析，可将从圆到不圆阶段的事物进行分类。同时，唇齿擦音的发展阶段也得到了承认，而不圆擦音则被认为衰落得更厉害。这些研究结果表明，痕迹的日本唇/h/音在东北方言更广泛地认识到比已经估计，这意味着一个地理和世代复杂的性质。

There is a traces of the Japanese labial /h/ sounds in Tohoku dialects, but the decline is also remarkable. In this study, it tried to approach the actual condition by catching the variation of mouth shape, not only sees them as a phonetical feature. The following thing mainly became clear as a result of the site survey. - Although the typical bilabial fricatives remains in the dialect, from an analysis of mouth shape, the thing of the stages further from to rounded- unrounded are classified. It simultaneously the stage of the labiodental fricatives are recognized, and the unrounded fricatives considered that it declined more are accepted. These findings suggest that traces of the Japanese labial /h/ sounds in Tohoku dialects are more broadly recognized than have been estimated, implying a geographically and generationally complex nature.