Patent ID: 8759647
Filing Date: 2014-06-24
Classification: G10D

Abstract:
1. A sound board for a harp, comprising a wooden board having an elongate, approximately trapezoid shape provided on a front face with a central longitudinal profiled string-carrier member and on a reverse side with a central profiled reinforcing member or beam, made of a wooden material and with two side profiled members or sound bars, symmetrically disposed with respect to said reinforcing beam, and wherein a cross-section of said reinforcing beam has a central portion with an increased height or thickness and two adjacent, symmetrical side portions or wings having a height or thickness which tapers gradually towards outside through a concave arcuate profile up to a predetermined minimum value; wherein said minimum value of the height or thickness of the side portions or wings of said reinforcing beam is between about 1 and about 5 mm, and wherein at least in a lower half of said reinforcing beam the transverse width of each of said side portions or wings of said einforcing beam is between about 2/3 and about 3/3 of the transverse width of said central portion.