| 吸顶式传声器阵列阵元坐标标定方法 |
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| 引用本文： | 肖颖,杨亦春,韩宝坤,滕鹏晓.吸顶式传声器阵列阵元坐标标定方法[J].声学学报,2015,40(6):827-835. |
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| 作者姓名： | 肖颖 杨亦春 韩宝坤 滕鹏晓 |
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| 作者单位： | 1 山东科技大学机械电子工程学院 青岛 266590; |
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| 基金项目： | 国家自然科学基金(11174320,11304352)资助 |
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| 摘 要： | 提出了一种吸顶式传声器阵列阵元坐标的标定方法。针对在混响声场中,时延估计算法性能严重下降从而导致在标定传声器阵元坐标时产生较大误差的问题,提出了利用脉冲声源作为标定声源,并且截取脉冲源直达声的方法来抑制混响声场的影响,提高传声器阵元坐标标定的精度。建立了阵元坐标标定的误差分析模型,并以白噪声和脉冲声源作为标定声源进行数据仿真和对比分析。仿真结果表明,使用脉冲声源作为标定声源能有效地抑制混响声场的影响,获得传声器阵列阵元的准确坐标。同时,在封闭的房间内建立起孔径为3.5 m、64阵元的螺旋状吸顶传声器阵列进行了实验研究,实验结果验证了本文提出方法的有效性。
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| 收稿时间： | 2014-03-13 |
A microphone position calibration method for ceiling-mounted arrays |
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| Institution: | 1 College of Mechanical and Electronic Engineering, Shandong University of Science and Technology Qingdao 266590;2 Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences Beijing 100190 |
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| Abstract: | A microphone position calibration method for ceiling-mounted arrays is investigated in this paper. In reverberant environments, time delay estimation algorithm degrades severely, which introduces serious errors in calibrating microphone positions. Therefore, we propose a method that impulsive sound sources are used as calibration sources and the direct sound from an impulsive sound source is isolated to improve time delay estimation. The error analysis model is bulit in this paper and the simulation are performed using white noise and impulsive sound as calibration sources, respectively. The simulation results show that the proposed method can effectively suppress the influence of the reverberant field and allowed to obtain accurate positions. An experiment is carried out to calibrate the microphone positions of a spiral array mounted on the ceiling with the aperture of 3.5 m and 64 microphones in a closed room. The experimental results demonstrate the effectiveness of the proposed method |
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