强噪声环境下有源抗噪耳罩设计  

Design of active anti-noise earmuffs in heavy noise environment

作　　者：孙科伟[1] 李建海[1] 杨海东[1] 宋博[1] 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《工矿自动化》2013年第9期8-12,共5页Journal Of Mine Automation

基　　金：陕西省自然科学基础研究资助项目(2009JM8001-4);航空科学基金资助项目(20095596014)

摘　　要：针对现有的有源抗噪耳罩存在价格昂贵且佩戴不太方便的问题,设计了一种应用在强噪声环境下的有源抗噪耳罩。该耳罩以TMS320VC5509为主控芯片,采用自适应噪声抵消方案和归一化的最小均方算法提升耳罩的自适应噪声抵消性能,结合被动降噪技术,很好地实现了在强噪声环境下消除噪声的目的。测试结果表明,该耳罩在低频范围内抗噪性能最高可达到30dB。In view of problems of expensive and inconvenient to wear of existing active anti-noise earmuffs,an active anti-noise earmuff in heavy noise environment was designed.The earmuff takes TMS320VC5509 as processor,and adopts adaptive noise cancellation method and the normalized least mean square algorithm to enhance adaptive noise cancellation performance.Combined with passive noise reduction technology,the earmuff realizes purpose of noise cancellation in heavy noise environment.The experimental results show that anti-noise performance of the earmuffs is up to 30 dB.

关 键 词：抗噪耳罩 有源抗噪 被动降噪 自适应噪声抵消 归一化最小均方算法 

分 类 号：TD655[矿业工程—矿山机电]