发明名称 |
NOISE ATTENUATION DEVICE |
摘要 |
A noise attenuation device comprising an array of quarter wave resonators (10), having varying mouth widths w when in use are disposed adjacent an aperture or ventilation opening (73) having a width H. The resonators (10) are tuned to a resonant frequency, increasing from one face of the attenuation device to another, such that w > H. In a second embodiment, a second array (40) tuned to a different frequency is disposed on the opposite side of the aperture (73), the aperture (73) being kinked so that there is no direct line of sight through the device.
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申请公布号 |
WO0029684(A1) |
申请公布日期 |
2000.05.25 |
申请号 |
WO1999AU01012 |
申请日期 |
1999.11.16 |
申请人 |
FIELD, CHRISTOPHER, DAVID;FRICKE, FERGUS |
发明人 |
FIELD, CHRISTOPHER, DAVID;FRICKE, FERGUS |
分类号 |
E04B1/70;F24F13/24;G10K11/172;(IPC1-7):E04B1/84 |
主分类号 |
E04B1/70 |
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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