Acoustical hearing protective devices utilizing dynamically...

A - Human Necessities – 61 – F

Patent

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A61F 11/08 (2006.01) A61F 11/10 (2006.01) A61F 11/14 (2006.01) H04R 1/10 (2006.01)

Patent

CA 2234156

An earmuff cushion (22, 24) and other foam hearing protective components such as earplugs and pods for semi-aural hearing protectors (20) and earplugs providing improved attenuation are described. The cushion (22, 24) and other foam hearing protective components are comprised of a dynamically stiff foam material having a low static stiffness, and a high dynamic stiffness, which produces improved attenua- tion in the earmuff and other hearing protective devices in which it is used. Earmuffs made from the cushion (22, 24), semi-aural hearing protectors, earplugs, and improved method of making the hearing protective devices are also described.

L'invention concerne un coussinet (22, 24) pour protecteurs auriculaires et autres moyens de protection auditive en mousse (tels que bouchons d'oreilles et boules de protection partielle de l'ouïe (20)) qui assurent une atténuation du bruit améliorée. Le coussinet (22, 24) et les autres moyens de protection auditive en mousse sont composés d'un matériau en mousse rigide dynamique ayant une faible rigidité statique et une rigidité dynamique élevée. Les protecteurs auriculaires et autres moyens de protection auditive en mousse fabriqués avec ledit matériau assurent une atténuation du bruit améliorée. L'invention concerne également des protecteurs auriculaires fabriqués avec ledit coussinet (22, 24), des moyens de protection auditive, des bouchons d'oreilles et un procédé amélioré de fabrication des protecteurs auriculaires.

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