| 存在气流的消声扁管道声学特性的实验研究 |
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| 引用本文： | 俞悟周,王佐民.存在气流的消声扁管道声学特性的实验研究[J].声学技术,1996,15(3):105-108. |
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| 作者姓名： | 俞悟周 王佐民 |
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| 作者单位： | 同济大学声学所 |
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| 摘 要： | 本利用Ｍ序列相关技术有效地抑制背影噪声的特点，对不同气流下的扁消声管道的声学特性做了实验研究，对插入损失和传递损失随气流马赫数的变化，进行了Ｍ序列法测量，并与理论值及传统方法的测量值做了比较，实验表明，存在气流时，消声特性的Ｍ序列相关技术测量结果，比传统方法具有更高的可信度。
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| 关 键 词： | 声学测量 消声管道 管道 噪声 |
| 收稿时间： | 1996/1/30 0:00:00 |
Measurement of attenuation characteristics in absorbent narrow duct with mean flow of diff erent velocity |
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| YU Wuzhou and WANG Zuomin.Measurement of attenuation characteristics in absorbent narrow duct with mean flow of diff erent velocity[J].Technical Acoustics,1996,15(3):105-108. |
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| Authors: | YU Wuzhou and WANG Zuomin |
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| Affiliation: | Institute of Acoustics, Tongji University, Shanghai 200092;Institute of Acoustics, Tongji University, Shanghai 200092 |
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| Abstract: | Experimental research has been done on the a coustical reduction characteristics of absorbentduct with mean flow of different velocity.Transmission loss and insertio nloss are measured by using M-sequence correlation method and traditional method in the ductrespectively.Due to the M-sequence correlation technique can effectively surpress the regenerated noise caused by the flow in the duct,there fore the results of M-sequence correlation method are more reliable than those of traditional method. |
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| Keywords: | correlation technique aco ustical measurement |
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