| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a ball striking sound of the higher quality in a golf club head having a hollow part. <P>SOLUTION: In the golf club head 1 having the hollow part t with the area of 50 cm<SP>2</SP>or more to 700 cm<SP>2</SP>or less, a sound absorbing material 6 with the sound absorption rate of 0.5 or more to less than 0.99 at 6000 Hz measured in conformity with ISO 10534-2 is provided within the hollow part t. The apparent ratio of the volume of the sound absorbing material 6 to the volume of the hollow part t. is 20% or more to 90% or less. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
