Topic As for topic of this invention, permeability of absorption or sound of sound is adjustment possible with the system which is defined, it is to improve the widely known auditory protective earplug of the kind of type where occurrence of disturbance sound is evaded and or is decreased.Solutions In case of the auditory protective earplug which consists of the foaming material, at the same time in order to achieve the attenuation which is defined in order in order to evade from the breakdown which originates in the occurrence sound of the self, the surface of the auditory protective earplug the end face inside (2) the cavity section (5 and 6) to possess in the territory, it is formed. The auditory protective earplug it consists of the base substance (1), this base substance (1) central central vertical axis (12) with, this central central vertical axis (12) the end face inside the axial symmetry (2) and the end face outside the axial symmetry (3) has had in direction. The end face inside (2), inside having expanded the surface, the cavity section (5 and 6) is provided in the territory, these cavity sections (5 and 6) as for one side, the end face inside starts from (2), central vertical axis (12) has extended to the direction inside in lengthwise the central vertical cavity section inside as (6). Furthermore, the central vertical cavity section outside (8) is provided, this cavity section (8) the end face outside starts from (3), central vertical axis (12) has extended to inside in lengthwise. It is separated mutually the transverse wall which the central vertical cavity section inside and outside (6 and 8), extending has been present vertically central central vertical axis (12) vis-a-vis and continues (7) by.
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