| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To increase repulsion against a ball to the maximum. <P>SOLUTION: In the golf club head, the frequency F(fix) showing the primary minimum value of a frequency transfer function of the head 1 and measured by an excitation method in which the head 1 is fixed onto an excitation is 200-1400(Hz). The frequency F(free) in which a minimum value of the frequency transfer function of the head 1 becomes the minimum and which is measured by an impact hammer method in which the head 1 is in a (free) state is 000-9000(Hz). <P>COPYRIGHT: (C)2004,JPO</p> |
