| 摘要 |
<p>There is disclosed herein a single-flange hearing protective earplug of the push-in type. The earplug comprises a resilient polymeric foam body element (1) having a rounded nose end (4) and, coextensive therewith, a rearwardly directed skirt (5) defining a flange (9) and an elongate axial stem (10) extending rearwardly from the body element (1). The earplug, in one or more of its embodiments, is characterized by feature of universal fit; comfort during insertion, wearing and removal; effective acoustic attenuation; easy insertion and removal and generally linear attenuation over the audible frequency spectrum. In a preferred embodiment of the invention the earplug features a duality of insertion modes and can be utilized either as a push-in or roll-down type of hearing protector.</p> |
