US Patent 8450587 Bracing system for stringed instrument

A bracing structure for a soundboard for a musical instrument is disclosed, the bracing structure being a unitary sheet structure having a plurality of elongate semi-tubular elements. Each of the elongate semi-tubular elements has a length, a thickness, a width, a height and an interior resonance space. The sheet structure may be formed of two or more layers. The elongate semi-tubular elements function as traditional braces, however, the shape of the elongate semi-tubular elements may be modified to provide a desired tonal quality.