数字音频设备满度电平及与模拟电平的关系

Full-scale Electrical Level of Digital Voice-frequency Equipment and its Relationship with Analog Electrical Level

在模拟与数字音频混合系统中，由于两者在电平监控时概念不同，系统连接时如音频电平设置不当就会产生失真，使节目声音响度（loudness）不一致，降低系统的整体指标。介绍了模拟电平和数字（digital）设备满度电平的概念以及混合系统音频电平设置的有关基本概念。

In analog and digital voice-frequency hybrid system, the two systems are different in electrical level supervisory. So if the voice-frequency electrical level is not properly set up, the program loudness will be inconsistent and the performance of whole system will be reduced. This article introduces the concept of analog electrical level and digital equipment full-scale electrical level and some basic concept relevant to hybrid system voice-frequency electrical level set up.