发明专利
JP2009210700A Narrow bandwidth active noise control method and narrow bandwidth active noise control device
有权
基本信息:
- 专利标题： Narrow bandwidth active noise control method and narrow bandwidth active noise control device
- 专利标题（中）：窄带主动噪声控制方法和窄带带宽主动噪声控制装置
- 申请号：JP2008051937 申请日：2008-03-03
- 公开(公告)号：JP2009210700A 公开(公告)日：2009-09-17
- 发明人： XIAO YEGUI , IKUTA AKIRA , SHIMIZU NOBUAKI , INOUE SHIGEKI , KODATE KAZUHIRO , MITSUI KOJI , YASUE AKIRA
- 申请人： Japan Steel Works Ltd:The , 株式会社日本製鋼所
- 专利权人： Japan Steel Works Ltd:The,株式会社日本製鋼所
- 当前专利权人： Japan Steel Works Ltd:The,株式会社日本製鋼所
- 优先权： JP2008051937 2008-03-03
- 主分类号： G10K11/178
- IPC分类号： G10K11/178
摘要：
PROBLEM TO BE SOLVED: To provide a narrow bandwidth active noise control method for efficiently canceling noise whose frequency can be estimated, in which noise canceling effect is not degraded, even when there is an estimation error of the frequency.
SOLUTION: A reference signal for simulating a sound wave of a frequency to be canceled is formed with a predetermined equation including a coefficient c
i (n). A control signal is calculated by changing an amplitude and a phase of the reference signal by a first order FIR filter. A second order sound wave is generated by the control signal, and interfered with noise. The first order FIR filter is adapted to the coefficient c
i (n) so that remaining sound after interference may become minimum.
COPYRIGHT: (C)2009,JPO&INPIT
摘要（中）：
SOLUTION: A reference signal for simulating a sound wave of a frequency to be canceled is formed with a predetermined equation including a coefficient c
i (n). A control signal is calculated by changing an amplitude and a phase of the reference signal by a first order FIR filter. A second order sound wave is generated by the control signal, and interfered with noise. The first order FIR filter is adapted to the coefficient c
i (n) so that remaining sound after interference may become minimum.
COPYRIGHT: (C)2009,JPO&INPIT
要解决的问题：即使当存在频率的估计误差时，提供用于有效地消除频率可被估计的噪声的窄带宽有源噪声控制方法，其中噪声消除效果不劣化。 解决方案：用于模拟要消除的频率的声波的参考信号由包括系数c（SB）的预定方程式形成。 通过用一阶FIR滤波器改变参考信号的幅度和相位来计算控制信号。 二次声波由控制信号产生，并受到干扰。 第一阶FIR滤波器适合于系数c i （n），使得干扰之后的剩余声音可能变得最小。 版权所有（C）2009，JPO＆INPIT
公开/授权文献:
信息查询:
EspacenetIPC结构图谱:
| G | 物理 |
| --G10 | 乐器；声学 |
| ----G10K | 发声器械（发生玩具入A63H5/00；乐器或其配件见有关各小类，例如G10D）；不包含在其他类目中的声学器械 |
| ------G10K11/00 | 声音的发送、传导或定向的一般方法或器械；防护或减小噪声或其他次声波、声波或超声波的一般方法或器械 |
| --------G10K11/16 | .声音的阻尼方法或装置 |
| ----------G10K11/175 | ..利用干涉效应；掩蔽声音 |
| ------------G10K11/178 | ...通过电声方法再生反相的原始声波 |