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    • 3. 发明专利
    • Sound isolating structure, sound isolator, and sound isolation method
    • 声音隔离结构,声音隔离器和声音隔离方法
    • JP2005105774A
    • 2005-04-21
    • JP2003344399
    • 2003-10-02
    • Takenaka Komuten Co Ltd株式会社竹中工務店
    • YAMADA SUKEOHIDAKA TAKAYUKI
    • E04B1/82G10K11/178
    • PROBLEM TO BE SOLVED: To provide a sound isolating structure capable of stably and efficiently shutting heavy floor impact sound at a story floor having many low frequency components by an active control. SOLUTION: Noise caused in an upper living room is transmitted to a cavity 14 through a floor 10. The noise transmitted to the cavity 14 includes the low frequency components of 250 Hz or less corresponding to the natural resonance frequency of the floor 10. The noise caused in the upper living room is detected by a reference microphone 18, and noise signals are outputted to a controller 24. On the other hand, residual sound remaining in the cavity 14 without being muffled is detected by an error microphone 22, and error signals are outputted to the controller 24. The controller 24 performs an adoptive control so that the error signals become minimum by using the inputted noise signals and error signals. Control signals obtained are outputted to a speaker 20. The speaker 20 radiates control sound generated according to the control signals toward the inside of the cavity 14. In the cavity 14, the noise is canceled by the radiated control sound. As a result, the vibration of a ceiling board 16 is prevented from occurring and the propagation of the noise to a lower living room can be prevented from occurring. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种隔音结构,其能够通过主动控制在具有许多低频分量的故事楼层上稳定有效地关闭重地板撞击声。 解决方案:上部起居室引起的噪音通过地板10传递到空腔14中。传递到空腔14的噪声包括对应于地板10的天然共振频率的250Hz或更小的低频分量 在上部起居室中产生的噪声由参考麦克风18检测,噪声信号被输出到控制器24.另一方面,通过误差麦克风22来检测空腔14中没有被消音的剩余声音, 并将误差信号输出到控制器24.控制器24通过使用输入的噪声信号和误差信号来执行过载控制使得误差信号变得最小。 所获得的控制信号被输出到扬声器20.扬声器20将根据控制信号产生的控制声音朝向空腔14的内部发射。在空腔14中,由辐射控制声消除噪声。 结果,防止了顶板16的振动,并且可以防止噪声向较低客厅的传播。 版权所有(C)2005,JPO&NCIPI