sound post
Noun
Meaning
sound post (plural sound posts)
(lutherie) A wooden rod located inside the body of a violin-family instrument, close to the treble-side bridge foot.
Examples
This can be accomplished by modifying the cello front plate, attaching a wolf eliminator, or moving the sound post.
Like the bridge, the sound post is not glued, but is kept in place by the tensions of the bridge and strings.
The latter are more heavily constructed and are fitted with a bass bar and sound post, like modern stringed instruments.