驻波管中声学材料隔声性能的修正计算方法 |
| |
引用本文: | 陶猛,;赵阳,;王广玮.驻波管中声学材料隔声性能的修正计算方法[J].噪声与振动控制,2014,34(4):115-118. |
| |
作者姓名: | 陶猛 ;赵阳 ;王广玮 |
| |
作者单位: | ( 1. 上海交通大学 机械系统与振动国家重点实验室,上海 200240;2. 贵州大学 机械工程学院,贵阳 550025 ) |
| |
基金项目: | 国家自然科学基金(11304050;51365007); 高等学校博士学科点专项科研基金新教师类课题(20135201120007); 上海交通大学机械系统与振动国家重点实验室开放课题(MSV-2013-01); 上海交通大学舰船设备噪声与振动控制技术重点学科实验室开放课题(VSN201301) |
| |
摘 要: | 用驻波管四传声器法,分析了透射管中多次透射反射波对隔声量测试结果的影响,在考虑所有多次透射反射波的因素后推导了修正计算公式。通过对不同样品的测试,比较了考虑所有透射反射波的修正方法与仅考虑第一次透射反射波的修正方法的区别。实验结果表明:采用吸声性能优良的透射管声学末端,考虑一次透射反射波的修正方法可以得到正确的测量结果;而如果采用吸声性能较差的透射管声学末端,则应该考虑到所有高次透射反射波的影响。
|
关 键 词: | 声学 驻波管 声学材料 隔声性能 修正方法 |
收稿时间: | 2013-09-12 |
Algorithm for Modification of Measurement Data for Sound Transmission Loss of Acoustical Materials in Standing-wave Pipes |
| |
Affiliation: | TAO Meng, ZHAO Yang , WANG Guang-wei ( 1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China; 2. School of Mechanical Engineering, Guizhou University, Guiyang 550025, China) |
| |
Abstract: | Based on the four-microphone method of the standing-wave pipe,the effect of the multi- transmitted-andreflected waves in the transmission pipe on the sound transmission performance is discussed.The modification formula associated with the multi-transmitted-and-reflected waves is derived.By measuring several samples in the standing-wave pipe,the difference between the overall multi- transmitted-and-reflected modification and only the first transmitted-reflected modification is compared.Experimental results show that if the sound absorption performance of the acoustical terminal is perfect,the first transmitted-reflected modification is good enough to obtain the accurate sound transmission loss;while the sound absorption performance of the terminal is not perfect as the expected,the overall multi- transmitted- reflected modification should be taken into account. |
| |
Keywords: | acoustics standing-wave pipe acoustical material sound transmission loss modification method |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《噪声与振动控制》浏览原始摘要信息 |
|
点击此处可从《噪声与振动控制》下载全文 |