机器噪声声功率级的简测方法的研究

通过双表面测量,求得吸声系数与环境修正值,再计算机器噪声声功率级。克服了由于不同房间噪声场分布不均与房间四壁吸声系数各不相问,必须估算房间表面平均吸声系数带来的困难。验证表明,所得结果在工程中实用是够精确的。

MEASUREMENT ON THE SOUND POWER LEVEL FOR MECHANICAL NOISE

Because of changeable distribution of noise fields in different room and the different absorption coefficients of walls and ceilings, average absorption coefficient of room surface hase to be estimated,which is really a great trouble . Now,this problem is solved,because,as discribed in this paper, the mechanical noise of the A weighted sound power level can be calculated after the absorption coefficient and environmental correction value is obtained. Experiences show that the result is accurate enough for engineering practice.