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| A New Method for Calculating the Sound Pressure Level of Anechoic Chambers |
| CHEN Huan1,TANG Qiu1,LIN Hai-jun2,TAN Xiao-ming3,LUO Peng3,TENG Zhao-sheng1 |
1.College of Electrical and Information Engineering, Hunan University, Changsha, Hunan 410082, China
2.College of Engineering and Design, Hunan Normal University, Changsha, Hunan 410081, China
3. Hunan Shengyi Measurement and Control Technology Co., Ltd, Hengyang, Hunan 421000, China |
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Abstract The inverse square law for calculating the sound pressure level was proposed in JJF 1147-2006 “Calibration Specification for Acoustic Performance of Anechoic Rooms and Hemi-anechoic Rooms”, causing a large deviation of sound pressure level near the sound source. For this problem, a new method of adding the air absorption attenuation factor and selecting the actual sound pressure level at the measurement position of 1 m to calculate the sound pressure level of the anechoic chamber is proposed. Through comparative experiments, the above situation can be well improved and the calibration accuracy can get increased.
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Received: 15 March 2019
Published: 17 February 2020
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［1］国家质量监督检验检疫总局. GB/T 6882-2016声学声压法测定噪声源声功率级消声室和半消声室精密法［S］. 北京: 中国标准出版社, 2016.
［2］International standards organization. ISO 3745-2012 Acoustics-determination of sound power levels of noise sources using sound pressure precision methods for anechoic and hemi-anechoic rooms ［S］. Geneva: HIS, 2012.
［3］国家质量监督检验检疫总局. JJF 1147-2006消声室和半消声室声学特性校准规范 ［S］. 北京: 中国计量出版社, 2006.
［4］杨德俊, 吴杰歆, 何卓斌, 等. 浅谈反平方律鉴定消声室自由声场的方法研究［J］. 家电科技, 2012, (4): 76-78.
Yang D J, Wu J X, He Z B, et al. Preliminary discussion on method to calculate the sound pressure level based on the inverse law in anechoic room［J］. Household appliance technology, 2012, (4): 76-78.
［5］蒲志强, 孙磊, 鄂治群. 一种用于消声室校准计算反平方律声压级的新方法［J］. 计量学报, 2013, 34(5): 466-468.
Pu Z Q, Sun L, E Z Q. New method on estimation of sound pressure level based the inverse law in anechoic room calibration［J］. Acta Metrological Sinica, 2013, 34(5): 466-468.
［6］蒲志强, 姚小兵, 孙磊, 等. 消声室声学性能评价方法探讨［J］. 中国测试, 2012, 38(5): 25-28.
Pu Z Q, Yao X B, Sun L, et al. Discussion on performance assessment of anechoic rooms［J］. China Measurement & Text, 2012, 38(5): 25-28.
［7］钟静, 夏哲雷. 一种新的消声室声压级的计算方法［J］. 中国计量学院学报, 2014, 25(2): 191-196.
Zhong J, Xia Z L. A new method to calculate the sound pressure level of anechoic rooms［J］. Journal of China jiliang university, 2014, 25(2): 191-196.
［8］王钦, 颜伟, 王恩荣, 等. 一种估算消声室室内声压级的新方法［J］. 南京师范大学学报(工程技术版), 2016, 16(2): 10-15.
Wang Q, Yan W, Wang E R, et al. A novel method on the sound pressure level estimation applied in anechoic chamber calibration［J］. Journal of Nanjing Normal University (Engineering and Technology Edition), 2016, 16(2): 10-15.
［9］国家质量监督检验检疫总局. GB/T 17247. 1-2000声学 户外声传播衰减 第1部分: 大气声吸收的计算［S］. 北京: 中国标准出版社, 2000. |
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2020, Vol. 41 
