Patent ID: 8731231

Claim:
A wideband dynamic sound transducer comprising: a chassis including an annular inner diaphragm support means and an annular outer diaphragm support means; a diaphragm system including a single diaphragm having first and second ridges, wherein the first ridge is coupled to the annular inner diaphragm support means of the chassis and the second ridge is coupled to the annular outer diaphragm support means of the chassis, wherein the diaphragm system has a hole in the center defined by the annular inner diaphragm support means of the chassis; and a moving coil coupled to a coil seat configured between the first and second ridges, wherein a stiffness of the diaphragm is lower toward the annular inner diaphragm support means and the annular outer diaphragm support means, causing a larger portion of the diaphragm to oscillate homogenously with the moving coil at low frequencies, and wherein the stiffness of the diaphragm is higher toward the coil seat, causing a smaller portion of the diaphragm to oscillate homogenously with the moving coil at high frequencies.