本文以北京师范大学北国剧场现场录音为例，对其剧场内部声学各参量进行理论阐释 与实践验证。通过对北国剧场环境的现场录音实践分析场厅环境对不同音乐会录音的影响， 以及研究北国剧场音乐会中不同演出形式的录音方法及后期混音。从而探究如何运用简单 设备在小剧场内对钢琴、民乐队、人声进行录音及后期制作。总结出如何在隔音条件、声 学环境不足的小型剧场内录制出清晰、有空间感的声音，并尽可能还原真实声音。

This article takes the on-site recording of the Beiguo Theater at Beijing Normal University as an example to theoretically explain and practically verify the various acoustic parameters inside the theater. Through on-site recording practice of the theater environment in Beiguo, analyze the impact of the theater environment on the recording of different concerts, and study the recording methods and post mixing of different performance forms in Beiguo theater concerts. To explore how to use simple equipment to record and post produce pianos, folk bands, and vocals in small theaters. Summarize how to record clear and spatial sound in small theaters with insufficient sound insulation and acoustic environment, and try to restore real sound as much as possible.