魂こん柱ちゅう

noun

sound post

Technical term in violin-family instruments; the small wooden dowel inside the body that transmits vibrations between the top and back plates.

• バイオリンの魂こん柱ちゅうが倒たおれたので、修しゅう理りに出だした。

  The sound post of my violin fell, so I took it in for repair.