发明名称 |
Active sound reduction aparatus and active noise insulation wall having same |
摘要 |
<p>An active noise insulation wall includes an active sound reduction apparatus disposed on an upper end surface of a noise insulation wall. The active sound reduction apparatus comprises a combination of an active acoustic control cell and a sound tube. The active acoustic control cell controls a coming noise such that a diffracted sound pressure component of the coming noise at the upper end surface of the noise insulation wall is actively reduced. The sound tube decreases a sound wave of a frequency different from a target frequency of the active acoustic control cell. Thus, the active noise insulation wall can effectively reduce noises including many frequency components.</p> |
申请公布号 |
EP1148470(A2) |
申请公布日期 |
2001.10.24 |
申请号 |
EP20010109419 |
申请日期 |
2001.04.20 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
OHNISHI, KEIZO;NISHIMURA, MASAHARU;TERANISHI, SUSUMU;ARAI, TAKANORI |
分类号 |
E01F8/00;G10K11/178;(IPC1-7):G10K11/178;G10K11/172 |
主分类号 |
E01F8/00 |
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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