Sound boards for harps

A sound board for a harp, comprising a wooden board having an elongate, approximately trapezoid shape provided on the front face with a central longitudinal profiled string-carrier member and on the 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 the reinforcing beam, and wherein the cross-section of the 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 the 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 the reinforcing beam is between about 1 and about 5 mm, and wherein at least in the lower half of the reinforcing beam the transverse width of each of said side portions or wings of the reinforcing beam is between about 2/3 and about 3/3 of the transverse width of the central portion.