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In a string instrument, the sound post or soundpost is a small dowel inside the instrument under the treble end of the bridge, spanning the space between the top and back plates and held in place by friction. It serves as a structural support for an archtop instrument, transfers sound from the top plate to the back plate and alters the tone of the instrument by changing the vibrational modes of the plates. The sound post is sometimes referred to as the ''âme'', a French word meaning "soul". The bow has also been referred to as the soul of these instruments. The Italians use the same term, ''anima'', for this.〔David D. Boyden. "Ame", ''Grove Music Online'', ed. L. Macy (accessed May 20, 2006), (grovemusic.com ) (subscription access).〕 Sound posts are used: * In all members of the violin family; * In some members of the viol family; * In some archtop guitars; * In other string instruments. ==Sound post adjustment== The position of the sound post inside a violin is critical, and moving it by very small amounts (as little as 0.5mm or 0.25mm, or less) can make a big difference in the sound quality and loudness of an instrument. Specialized tools for standing up or moving a sound post are commercially available. Often the pointed end of an S-shaped setter is sharpened with a file and left rough, to grip the post a bit better. Soundpost adjustment is as much art as science, depending on the ears, experience, structural sense, and sensitive touch of the luthier. The rough guidelines in the following section outline the effects of various moves, but the interaction of all the factors involved keeps it from being a simple process. Moving the sound post has very complex consequences on the sound. In the end, it is the ear of the person doing the adjusting that determines the desired location of the post. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sound post」の詳細全文を読む スポンサード リンク
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