发明名称 |
SOUND-ATTENUATING EARMUFF HAVING ISOLATED DOUBLE-SHELL STRUCTURE |
摘要 |
An earmuff assembly with a double-shell structure is disclosed for use with a sound-attenuating circumaural headset. The earmuff assembly comprises a cup-shaped outer shell mounted on a resilient outer sealing ring and a cup-shaped inner shell mounted on a resilient inner sealing ring. By means of the two sealing rings the outer and the inner shells are brought into abutment with the head surface around an ear of a wearer. Both shells are structurally rigid. The sound attenuation performance is maximized by isolating the inner shell from the outer shell.
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申请公布号 |
US2010218775(A1) |
申请公布日期 |
2010.09.02 |
申请号 |
US20100691821 |
申请日期 |
2010.01.22 |
申请人 |
DU YU;HOMMA KENJI;VAUDREY MICHAEL A |
发明人 |
DU YU;HOMMA KENJI;VAUDREY MICHAEL A. |
分类号 |
A61F11/14 |
主分类号 |
A61F11/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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