发明名称 ACOUSTICAL EARMUFF
摘要 <p>An earmuff cushion providing improved attenuation is described. The cushion is a foam material having a low static stiffness, and a high dynamic stiffness, which produces improved attenuation in the earmuff in which it is used. Earmuffs made from the cushion and improved methods of making the cushion and the earmuffs are also described.</p>
申请公布号 WO1994024185(A1) 申请公布日期 1994.10.27
申请号 US1994003972 申请日期 1994.04.12
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