基于蒙洛特实验，通过不同的信噪比，得到信号比和均方根误差的实验结果。-Based on the Mengluote experiment, through different signal to noise ratio, experimental results are obtained to signal ratio and the root mean square error.

计算声压级平均值的四种方法：算术平均法，声压均方根平均法，能量平均法等(Four methods to calculate the average of sound pressure level are arithmetic average method, pressure square root mean method, energy averaging method and so on)