| 摘要 |
A foam earplug that comprises: a first segment; a second segment; and a predetermined articulation zone disposed between the first segment and the second segment and adjacent the first segment and the second segment. The cross sectional area of the earplug taken at the articulation zone is no greater than about 80% of the cross sectional area of the earplug taken at the apex of the first segment and no greater than about 80% of the cross sectional area of the earplug taken at the apex of the second segment. |
