摘要
建立了声源声功率测量的通用数学模型。以半球测量面和平行六面体测量面为例 ,应用通用模型建立了两种情况下的声功率误差分析模型。验证了通过扫描路径近似所测得的声功率能够很好地反映声源的实际声功率。当人工执行扫描测量 ,实际扫描路径存在一定的偏移时 ,只要扫描偏移值在一定的容差范围内 ,所测得的声源声功率仍然能够取得较好的结果。
The general mathematical model of sound power determination is established firstly. The hemispherical and the parallelepiped measurement surfaces are investigated as examples. Subsequently, their error models are established on the basis of the common model of sound power measurement. The results show that the sound power measured by scanning along a given scanning path with a sound intensity probe can approximate the actual sound power of noise source effectively. When the scanning operation is carried out manually and the path is offset slightly, the measured sound power of noise source is still valid provided the offset is limited to a certain degree.
出处
《振动工程学报》
EI
CSCD
北大核心
2004年第1期39-43,共5页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目 (编号 :5 0 2 75 0 4 4 )
高等学校博士点基金资助项目 (编号 :2 0 0 2 0 35 90 0 5 )
安徽省自然科学基金资助项目 (编号 :0 0 0 4 74 18)
