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论文:2015,Vol:33,Issue(4):688-693 |
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引用本文： |
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代阳, 杨建华, 侯宏, 陈建平. 基于时域逆滤波的宽带脉冲声生成技术[J]. 西北工业大学学报 |
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Dai Yang, Yang Jianhua, Hou Hong, Chen Jianping. Pulse Sound Generation Based on Time-Domain Inverse Filter[J]. Northwestern polytechnical university |
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| 基于时域逆滤波的宽带脉冲声生成技术 |
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| 代阳1, 杨建华1, 侯宏2, 陈建平3 |
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1. 西北工业大学 自动化学院, 陕西 西安 710129;
2. 西北工业大学 航海学院, 陕西 西安 710072;
3. 中国船舶工业系统工程研究院, 北京 100094 |
| 摘要: |
| 为了改善扬声器的频率响应,生成稳定、可重复的宽带脉冲声信号,提出了基于时域逆滤波的宽带脉冲波生成技术。首先利用最长序列(MLS)测量扬声器的单位冲激响应,然后设计基于最小二乘(LS)准则和最小均方误差(MMSE)准则下的FIR逆滤波器,最后将信号分别经过FIR逆滤波器预处理,再次通过扬声器激励,生成了理想的巴特沃斯宽带脉冲信号。实验证明2种逆滤波算法行之有效,可以用于生成声学测试需要的宽带脉冲声,为实现声学性能现场测量提供了一种解决方案。 |
| 关键词:
逆滤波
宽带脉冲法
正则化
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| Pulse Sound Generation Based on Time-Domain Inverse Filter |
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| Dai Yang1, Yang Jianhua1, Hou Hong2, Chen Jianping3 |
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1. Department of Automatic Control, Northwestern Polytechnical University, Xi'an 710029, China;
2. School of Marine Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
3. China Ship Systems Engineering Research Institute, Beijing 100094, China |
| Abstract: |
| In order to improve the frequency response of loudspeaker and generate a stable and repeatable broadband pulse sound, a new technique of pulse sound generation based on time-domain inverse filter is proposed. Firstly, Maximum Length Sequence (MLS) is utilized to measure the impulse response of the loudspeaker. Then, an inverse filter is designed with Least Squares (LS) rule and Minimum Mean Square Error (MMSE) rule respectively. Finally, by exciting the loudspeaker with pre-filtered voltage signal, the desired Butterworth pulse sound can be produced successfully. Experimental results and their analysis show preliminarily that both inverse filter methods are effective, which can be applied in pulse sound generation and provide a solution to real-time online acoustic measurement in the field. |
| Key words:
acoustic generators
autocorrelation
convolution
deconvolution
design of experiments
efficiency
experiments
filters
FIR filters
Fourier transforms
frequency domain analysis
frequency response
least squares approximations
loudspeakers
matrix algebra
mean square error
time domain analysis
transfer functions
inverse filter
regularization
wide band pulse method
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| 收稿日期: 2014-10-28
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(11474230、11204242)资助 |
| 通讯作者:
Email： |
| 作者简介: 代阳(1988—),西北工业大学博士生,主要从事声学测试研究。
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| 作者相关文章 |
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| 代阳 在本刊中的所有文章 |
| 杨建华 在本刊中的所有文章 |
| 侯宏 在本刊中的所有文章 |
| 陈建平 在本刊中的所有文章 |
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