| 摘要 |
A helmet formed of a rigid shell and, internally thereof, a liner sized and shaped to the head of the wearer with ear cups secured to the liner. The ear cups have a peripheral surface positionable in contact with the wearer's head. The peripheral surface includes a first annular tube filled with a gel material in contact with the wearer's head around the ears and a second annular tube for urging the first annular tube into conforming contact with the wearer's head. The second annular tube is inflatable and includes tubing means extending through the shell with valve means for inflation and deflation thereof. Also disclosed is the method of fabricating the shell to fit an individual wearer.
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