发明名称 |
Evacuated enclosure mounted acoustic actuator and passive attenuator |
摘要 |
This invention presents a novel means to passively achieve a compact moving-coil actuator with a very low natural frequency. The diaphragm and voice coil are mounted in a sealed enclosure from which the air is partially or completely evacuated. This reduces the air spring effect. The diaphragm is supported by a non-linear, buckling, or collapsible support apparatus. By taking advantage of the non-linear stiffness properties of such structures, the stiffness of the actuator can be designed to be small at the operating point, which when combined with the moving mass, yields a low natural frequency.
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申请公布号 |
US6739425(B1) |
申请公布日期 |
2004.05.25 |
申请号 |
US20020116892 |
申请日期 |
2002.04.05 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE |
发明人 |
GRIFFIN STEVEN;HENDERSON BENJAMIN K.;GUSSY JOEL;LANE STEVEN A. |
分类号 |
G10K11/16;H04R1/28;(IPC1-7):G10K13/00;H04R7/00;H04R25/00 |
主分类号 |
G10K11/16 |
代理机构 |
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代理人 |
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主权项 |
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