The bind bar is a small piece of maple that is attached to the soundboard at the very treble end of the soundboard. The glue surface for attaching the soundboard to the piano is very thin at this area. The bind bar serves two purposes. First, it insures that the glue joint will not fail in that are as six screws go through the bind bar into the piano rim. Secondly, the bind bar adds some mass to that narrow part of the board, and reflects the vibrations back in the board. On many pianos the bind bar is simply a 1/4" thick piece of wood glued to the top of the board. On Steinways it is actually triangular shaped. The end of the board is cut at a 30 degree angle to accommodate the triangular shaped gluing surface. This requires some additional work and a jig for glue up, but I do believe it does make that area of the board more vibration reflective.
No comments:
Post a Comment