发明名称 |
Noise reducing screen devices for in-flow pressure sensors |
摘要 |
An acoustic sensor assembly is provided for sensing acoustic signals in a moving fluid such as high speed fluid stream. The assembly includes one or more acoustic sensors and a porous, acoustically transparent screen supported between the moving fluid stream and the sensor and having a major surface disposed so as to be tangent to the moving fluid. A layer of reduced velocity fluid separating the sensor from the porous screen. This reduced velocity fluid can comprise substantially still air. A foam filler material attenuates acoustic signals arriving at the assembly from other than a predetermined range of incident angles.
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申请公布号 |
US5684756(A) |
申请公布日期 |
1997.11.04 |
申请号 |
US19960589671 |
申请日期 |
1996.01.22 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION |
发明人 |
SCHMITZ, FREDRIC;LIU, SANDY;JAEGER, STEPHEN;HORNE, W. CLIFTON |
分类号 |
G01L11/04;H04R1/08;(IPC1-7):H04R1/02 |
主分类号 |
G01L11/04 |
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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