Musical String Core With Mixed Fiber Cross-Sections

The patent applies local quality by varying the cross-sectional shape and surface area of individual plastic fibers within the string core. Instead of using uniformly identical fibers, the invention incorporates fibers with different local geometries (e.g., circular, oval, triangular cross-sections with different surface areas) to create diverse contact regions and friction characteristics at specific locations, thereby enabling sound adjustment while maintaining manufacturing consistency through controlled geometric variations.

The patent applies parameter changes by systematically varying the cross-sectional surface area of plastic fibers to independently control sound quality and load-bearing capacity. By adjusting parameters such as fiber cross-sectional shape (circular, oval, triangular) and surface area while maintaining consistent material composition and tension, the invention enables separate optimization of acoustic properties (fuller sound through increased fiber surface content) and mechanical properties (load-bearing capacity through controlled fiber geometry), resolving the trade-off between these two critical performance aspects.

The patent applies segmentation by dividing the string core into multiple plastic fibers with different cross-sectional shapes and surface areas. This segmentation allows independent control of sound characteristics through the geometric properties of individual fibers while maintaining a modular structure that can be manufactured using standardized processes. The invention segments the fiber population into distinct geometric categories (e.g., circular, oval, triangular cross-sections) that can be produced through controlled extrusion or forming techniques, thereby achieving versatile sound control without proportionally increasing manufacturing complexity.