Patent ID: 8739798

Claim:
A hearing protection earplug comprising a main body ( 1 ) consisting of foamed material, wherein a) the main body ( 1 ) has a central center longitudinal axis ( 12 ) and in the direction of said central center longitudinal axis ( 12 ) an axially inner end face ( 2 ) and an axially outer end face ( 3 ), b) surface area enlarging inner hollows ( 5 , 6 ) are provided in the area of the inner end face ( 2 ), and include an inner central longitudinal hollow ( 6 ), which extends inward longitudinally relative to the center longitudinal axis ( 12 ), starting from the inner end face ( 2 ), c) an outer central longitudinal hollow ( 8 ) is provided that extends inward longitudinally relative to the center longitudinal axis ( 12 ), starting from the outer end face ( 3 ), d) the inner and the outer central longitudinal hollows ( 6 , 8 ) are separated from each other by a continuous transverse wall ( 7 ) extending perpendicular relative to the central center longitudinal axis ( 12 ), and e) the surface area enlarging inner hollows ( 5 , 6 ) further include at least partly circumferential-surface hollows ( 5 ) disposed at a circumferential outer surface ( 13 ) of the main body ( 1 ) and extending in the direction of the central center longitudinal axis ( 12 ) and extending to within the inner end face ( 2 ) resulting in a texturing of the inner end face ( 2 ) and in a formation of cavities in the inner end face ( 2 ), and wherein the hearing protection earplug is formed from an injection molded material and in one piece.