提出了一种用于弹体药室容积的音频检测新方法。依据音频共振原理，利用共振频率和内耗两个音频参数的共同作用，快速在线检测弹体药室容积，并用此法与传统的“水称重”法进行理论和实验对比分析。应用计算机进行数值拟合，建立了数学模型，并利用回代法予以验证。 A new audio detection method for projectile chamber volume was proposed. According to the principle of audio resonance, the volume of the projectile chamber was quickly and in-line detected by the combination of two resonant frequency and two internal audio parameters. The theoretical and experimental comparisons were made between this method and the traditional “water weighing” method. Computer numerical simulation is applied to establish a mathematical model and verify it by using the back-substitution method.