基于Raynoise软件计算的全消声室自由声场半径

Based on Raynoise Calculation of Free Sound Field Radius for the Anechoic Chamber

全消声室是汽车NVH性能的研发、测试及改进的平台。自由场是声学试验室中的一个重要的性能指标,自由场半径大小决定着被测物体的大小,为了对全消声室中的自由声场进行计算,应用Raynoise软件对全消声室声场进行仿真计算,并利用ISO 3745-2012所规定的最大允许偏差进行了自由声场的鉴定。

The anechoic chamber is the performance of auto harshness(NVH)research and development,testing and improvement of platform. The free field is an important performance index for acoustic laboratory. Free field radius size determines the size of the object to be tested,Calculated for the free sound field in the anechoic chamber,Raynoise application on free sound field radius for the anechoic chambe simulation calculation,and by using the ISO 3745-2012 the maximum allowable deviation stipulated in the free field identification.