| 主权项 |
1. An earplug comprising:
a core comprising a first end, a second end, and a major outer surface, wherein a longitudinal axis extends between the first end and the second end; a sound attenuating body attached to the major outer surface of the core, the sound attenuating body comprising a tip and a base, wherein the tip of the sound attenuating body is located proximate the first end of the core and the base is located closer to the second end of the core than the first end of the core, and wherein the core extends through at least a portion of the sound attenuating body; and a tip cavity in the sound attenuating body, wherein the tip cavity extends from the tip of the sound attenuating body towards a bottom nearest to the base of the sound attenuating body, and wherein the tip cavity comprises a tip cavity cross-sectional area that is greater than a core cross-sectional area, wherein the tip cavity cross-sectional area is measured in a first plane located at the first end of the core and transverse to the longitudinal axis, wherein the core cross-sectional area is measured in a second plane transverse to the longitudinal axis, wherein the second plane passes through the sound attenuating body below the bottom of the tip cavity and above the base of the sound attenuating body. |
