Preferred frequencies for the acoustical measurement 声学测量中的常用频率
Preferred frequencies , frequency levels , and band numbers for acoustical measurements 声学测量的优先选择频率频率级和频带数
Test method for vertical rebound characteristics of sports surface ball systems ; acoustical measurement 球类运动场垂直回弹特性试验方法.声学测量
Standard test method for vertical rebound characteristics of sports surface ball systems ; acoustical measurement 球类运动场垂直回弹特性的标准试验方法.声学测量
After the reverberation room is built , it is shooed by acoustical measurement that every tales is satisfing or better than of the national standard 测量表明,建成完工后的混响宣在声学万面的各项指标均满足或优于国家标准的要求。