Test code for the determination of airborne noise level of hydraulic pumps 液压泵空气传声噪声级测定规范
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Sonic noise can be solved through using arithmetic mean in place of the real numerical value to increase signal and noise ratio 对于声噪声,我们采用算术平均值来代替其真值的方法来提高回波的信噪比,从而对声噪声进行抑制。