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| The Test and Analysis of Sound Absorbing Wedge with Standing Wave Ratio Method |
| TONG Xian1，2 ,YAO Lei2 |
1.China Jiliang University, Hangzhou, Zhejiang 310018, China;
2.Zhejiang Institute of Metrology, Hangzhou, Zhejiang 310013, China |
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Abstract To achieve a high-precision and efficient way to measure the property parameters of sound absorbing material , an automatically measure system is developed with many devices such as PLC, stepping motor, which is based on standing wave theory. Many factors are described, for example, some wedges with a section of 0.6 m×0.6 m are tested and analyzed, including how to choose standing wave ratio. During the measurement, attenuation of sound wave and the mounting of wedge and microphone needn’t considered. As to the standing wave ratio, the first set value can meet requirements of engineering application measurement.
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| About author:: 童宪（1987－）,男,浙江兰溪人,中国计量学院硕士研究生,主要从事声学、振动方面的计量、测试与分析研究。tongxian111@yahoo.com.cn |
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［1］Suhanek M, Jambrosic K, Horvat M. A comparison of two methods for measuring the sound absorption coefficient using impedance tubes［C］//IEEE.50th International Symposium ELMAR-2008, Zadar, 2008,321-324.
［2］Heed C. Sound absorption and acoustic surface impedance ［R］. Marcus Wallenberg Laboratorietr Ljud- och Vibrationsforskning,2008.
［3］Farina A, Fausti P. Standing wave tube techniques for measuring the normal incidence absorption coefficient: comparison of different experimental setups［C］//FASE.11th International FASE Symposium,Valencia, 1994.
［4］国家质量监督检验检疫总局.GB/T 18696.1—2004 声学, 阻抗管中吸声系数和声阻抗的测量 第1部分-驻波比法［S］.2004.
［5］杜功焕,等. 声学基础［M］. 南京:南京大学出版社,227-228.
［6］建设部.GBJ 88—1985 驻波管法吸声系数与声阻抗率测量规范［S］.1985.
［7］国家质量监督检验检疫总局.JJF 1223—2009 驻波管国家校准规范（驻波比法）［S］.2009. |
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2013, Vol. 34 
