Patent ID: 8243979
Filing Date: 2012-08-14
Classification: H04R

Abstract:
1. A sound device, comprising: a full-gamut single-body sound membrane; a voice coil; a dust cover; and an assembly structure, materials of different kinds of beating degrees being applied at different positions of the sound membrane, wherein a structural intensity of materials is changed radiantly, radially and gradually, from an innermost rim of the sound membrane toward an outermost rim of the sound membrane, such that the structural intensity gradually decreases from the innermost rim toward the outermost rim, to satisfy requirements of sounding for the full-gamut of audible frequency, wherein the sound membrane, integrally manufactured as a single body, includes at least a high-intensity fine-fiber membrane, a mid-intensity mid-fiber membrane, and a low-intensity coarse-fiber membrane, which are formed by changing the structural intensity of the material radiantly, radially and gradually, further wherein the high-intensity fine-fiber membrane is made by high-intensity material of beating structure essentially based on a beating degree of Schopper-Riegler (SR)28° with a margin of SR5°, with the beating degree being adjusted to conform with the structure of the high-intensity fine-fiber membrane, and further wherein the high-intensity material is chosen from hemp, flax, high-intensity chemical fiber or nano-grade chemical fiber.