| 摘要 |
An earplug of the type that has a stem (12) and a plurality of flanges (21-23), is constructed to be stiff enough to be easily inserted into the ear canal, and to thereafter press with minimal force against the walls of the ear canal for comfort. The earplug is molded of an elastomeric material whose stiffness decreases considerably, such as at least 4%, when it is warmed from room temperature (about 72<sup |
