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广播信号的平均调幅度是影响广播覆盖面积、信噪比、电能利用率的重要参数．监测平均调幅度是从技术角度检验广播社会效益的主要方法．本文提出的“有声平均调幅度”定义和测量方法，对于改变现行的人工监测方法，实现平均调幅度监侧的定量化、自动化具有重要的现实意义．实测结果稳定可靠．
The average modulation amplitude of the broadcast signal is an important parameter that affects coverage area, signal-to-noise ratio and power utilization rate. Monitoring the average modulation amplitude is the main method of testing the social benefits of broadcasting from a technical point of view. The definition and measurement method of “average amplitude modulation with sound” proposed in this paper is of great practical significance for changing the current manual monitoring methods and realizing the quantitative and automatic monitoring of the average modulation amplitude. The measured results are stable and reliable.