| 摘要 |
PURPOSE:To realize an increase of the high-pitched sound region for the reproduced sound region with the low-range part maintained, by coating a reinforcement material having a strength and elasticity higher than the base material onto the surface of the base material having a small thickness at the center part and a large thickness at the outer circumference part. CONSTITUTION:The reinforcing material 2 having a strength and elasticity higher than the base material 1 is coated on the surface of the material 1 having a small thickness at the center part 3A and a large thickness at the outer circumference part 3B. For the reinforcing material 2 of the base material 1, the metals such as Al, Ti, Ni, B and Be, the ceramics like Al2O3, SiC and the like plus the resin, graphite, carbon, paper and others are used singly or in combination. According to its purpose, material 1 may be of a high-density structure, a porous substance structure, a honeycomb structure, a foam structure, a three-dimensional mesh structure or others. The coating of the material 2 is carried out by adhesion, chemical vapor phase deposition, vacuum vapor deposition, sputtering, ion plating and other methods. |
