Improvements in or relating to the sound-boards of pianofortes

摘要

259,762. Best, F. J. Oct. 14, 1925. Pianofortes, soundboards for.-Belly-bars b of channelsection are glued diagonally to the underside or back of the soundboard a with the edges of the channel in contact with the board. The ends of the bars b are chamfered away to permit the sound vibrations set up in the passages to be transmitted to the outer air.