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Air damped hearing protector earseal

阅读:494发布:2022-02-23

专利汇可以提供Air damped hearing protector earseal专利检索,专利查询,专利分析的服务。并且A hearing protector earcup having an earseal in the form of an annular envelope of highly flexible plastic sheet material held tightly against a rigid inwardly directed flange of the earcup. Capillary holes are provided through the rigid earcup flange in communication with larger openings in the envelope of the earseal wherewith airflow through the capillary orifices, into and from the earseal envelope, is exploited to achieve greater wearing comfort and strong damping of vibrations of the earcup resulting from excitation by ambient low-frequency sound waves. An additional small opening through an outer wall of the cup vents its interior.,下面是Air damped hearing protector earseal专利的具体信息内容。

1. The improvement in a hearing protector earcup having an earseal in the form of an annular envelope of flexible sheet material held against a rigid inwardly directed lateral flange of the earcup comprising: said rigid flange having a number of capillary holes extending therethrough and said one side of said earseal envelope having at least one opening therein, said opening being aligned with one of said capillary holes wherewith communication between the interiors of said envelope and said earcup through said opening and said one capillary hole is established for achieving a damping of vibrations of the earcup and enhanced wearing comfort.
2. The improvement in a hearing protector earcup according to claim 1 wherein said opening in said earseal envelope is of a substantially larger size than the diametral size of any one of said capillary holes.
3. The improvement in a hearing protector earcup according to claim 1 wherein a plurality of said capillary holes and a corresponding number of said openings are provided in said flange and earseal envelope respectively, said openings being disposed in at least approximate alignment with said capillary holes and further each being of substantially larger size than the diametral dimension of any one of said capillary holes.
4. The improvement in a hearing protector earcup according to claim 1 including a ventilative opening extending through a side of said earcup for maintaining substantially equalized air pressure internally and externally of said earcup.
5. The improvement in a hearing protector earcup according to claim 4 still further including a dust cover on said earcup extending over said ventilative opening for protection thereof against collection of ambient foreign matter.
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