At he same time, muffler styles and evaluation of acoustic performance and analysis methods of acoustic characteristic are introduced detail by detail.
同时，对消声器的分类，消声性能评价以及消声特性分析方法进行了详细的说明。
This paper introduces modal acoustic emission evaluation technique, including its fundamental principles, signal characteristic, noise rejection and source location etc.
本文介绍了模态声发射检测技术的基本原理、信号特征、噪声剔除和源定位等内容。
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