公开(公告)号：US4436179A

公开(公告)日：1984-03-13

申请号：US335617

申请日：1981-12-30

申请人： Tsuyoshi Yamamoto ,  Norihisa Taniguchi ,  Kazuyoshi Iida ,  Yoshikazu Kondo

发明人： Tsuyoshi Yamamoto ,  Norihisa Taniguchi ,  Kazuyoshi Iida ,  Yoshikazu Kondo

IPC分类号： E01F8/00 ,  E04B1/82 ,  E04B1/86 ,  G10K11/175 ,  G10K11/00

CPC分类号： E01F8/0041 ,  G10K11/175

摘要： A noise control apparatus for reducing a sound volume of a noise propagating from a noise source such as a railroad includes a sound arresting wall placed apart from the noise source. Means for shifting in phase and refracting the acoustic wave of the noise is disposed at substantially the top of the noise arresting wall. The above means, for example, has a plurality of passageways extending substantially along the propagating direction of the acoustic wave of the noise and the length of the passageways varies. Through the above means, a part of the acoustic wave from the noise source is refracted and the phase thereof is shifted to be a refracted propagating sound, which thereafter interferes with the other part of the acoustic wave directly from the noise source to thereby reduce a sound volume to a great extent.

摘要翻译： 用于减少从诸如铁路的噪声源传播的噪声的音量的噪声控制装置包括与噪声源分离的隔音壁。 用于相位偏移和折射噪声的声波的装置设置在噪声拦截壁的大致顶部。 上述装置例如具有基本沿着噪声的声波的传播方向延伸的多个通道，并且通道的长度变化。 通过上述手段，来自噪声源的声波的一部分被折射，并且其相位被偏移为折射传播声音，其随后直接从噪声源干扰声波的另一部分，从而减少 音量在很大程度上。