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| 基于倒频谱方法测量吸声系数的一种新方法 | |
| 引用本文： | 刘彦明,朱从云,黄其柏.基于倒频谱方法测量吸声系数的一种新方法[J].机械设计与制造,2011(2). |
| 作者姓名： | 刘彦明 朱从云 黄其柏 |
| 作者单位： | 1. 中原工学院,现代教育技术中心,郑州,450007 2. 中原工学院,机电学院,郑州,450007 3. 华中科技大学,机械科学与工程学院,武汉,430074 |
| 摘 要： | 提出了在随机声波入射下,基于倒频谱分析的测量吸声系数的一种新方法。在被测的系数材料的近前方放置一个麦克风,在随机声波入射下,该麦克风检测出麦克风处的声压,将此声压变换成倒频谱,再与入射声压的倒频谱对比,得到被测吸声材料表面的反射系数,从而得到该吸声材料的吸声系数。最后进行了实验,首先研究了麦克风距离吸声材料表面之间的距离与测得的吸声系数的关系;然后,研究了麦克风放置的位置以及被测吸声材料的面积与测得的吸声系数的关系;最后,对不同的吸声材料进行了实验。实验结果表明,在随机声波入射下,用该方法测量吸声系数是方便可行的。 |
| 关 键 词： | 吸声系数 反射系数 倒频谱 驻波管 |
A new method to measure the absorption coefficient based\on cepstrum analysis |
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| LIU Yan-ming,ZHU Cong-yun,HUANG Qi-bai.A new method to measure the absorption coefficient based\on cepstrum analysis[J].Machinery Design & Manufacture,2011(2). | |
| Authors: | LIU Yan-ming ZHU Cong-yun HUANG Qi-bai |
| Affiliation: | LIU Yan-ming1,ZHU Cong-yun2,HUANG Qi-bai3(1Zhongyuan university of technology,Zhengzhou 450007,China)(2School of Mechanical Science & Engineering,Zhongyuan university of technology,China)(3School of Mechanical Science & Engineering,Hua zhong university of science and technology,Wuhan 430074,China) |
| Abstract: | Absorption coefficient is an important absorption function of the absorption material,traditional measurement methods of which are standing wave tube and other measurement methods,which have some shortcomings.A new measurement method of absorption coefficient by the use of cepstrum is theoretically and experimentally studied.Firstly,a suitable distance between the microphone and the absorption material is selected.Then,the effects of the size of the absorption material and the position of the microphone on ... |
| Keywords: | Absorption coefficient Reflection coefficient Cepstrum analysis Standing wave tube |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |