摘要
针对某抽气泵排气噪声从高于80dB(A)降低到72dB(A)以下的要求,应用微穿孔板吸声体理论,设计双层串联微穿孔板消声器,并制作样件进行试验。结果表明安装消声器后,最大噪声值不超过67dB(A)。且在1000Hz～2500Hz频段,噪声下降尤为明显,消声量达到了10dB(A)～20dB(A),满足了设计的目标,验证了理论与实际的一致性。
An air extracting pump is required to reduce the noise from 80 dB （ A） to 72 dB （ A） . To solve the problem,a double layer micropunch plate muffler is designed on the basis of the theory of microperforated panel absorber and a sample is made for test. The results show that with installation of the muffler,the maximum noise is less than 67 dB （ A） . The noise is dropped obviously between 1,000 Hz ～ 2,500 Hz and sound deadening capacity reaches to 20 dB（ A） . The results fully achieve the design objective and verify the consistency of theory and practice.
出处
《机械科学与技术》
CSCD
北大核心
2010年第8期1094-1096,共3页
Mechanical Science and Technology for Aerospace Engineering
基金
国家"十一五"863计划项目(2009AA064805)资助
