发明名称 |
SEMI-INSERT HEARING PROTECTOR HAVING A HELMHOLTZ-TYPE RESONATOR |
摘要 |
<p>A semi-insert hearing protector includes a thin-walled enclosure sized substantially to that of the outer ear of a wearer, the enclosure being made from a rigid or semi-rigid material and secured to the head of said wearer by means of an adjustable headband. A short tube extends from the enclosure for communication with the ear canal, the short tube being made from a rigid or semi-rigid material and including a flexible cuff disposed over the tube made from a resilient material. The enclosure contains sound absorbing material configured to vary the frequency characteristic of sound attenuation by the semi-insert.</p> |
申请公布号 |
WO2009117220(A2) |
申请公布日期 |
2009.09.24 |
申请号 |
WO2009US35045 |
申请日期 |
2009.02.25 |
申请人 |
SYRACUSE UNIVERSITY;ZWISLOCKI, JOSEF, J. |
发明人 |
ZWISLOCKI, JOSEF, J. |
分类号 |
A61F11/06;A61F11/14 |
主分类号 |
A61F11/06 |
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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