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1 [通信]?模式噪声 ...调制）外调制（外调制）单纵模（Single-Longitudinal Mode,SLM）多纵模（Multi-Longitudinal Mode,MLM）模式噪声（Modal Noise）光斑噪声（Speckle Noise）模式分配噪声（Mode Partition Noise,MPN）LD（Laser Diode）--激光二极管LED--发光二极管APC--自动功... 2 ?模态噪声 ... 模态展开 modal expansion 模态噪声 modal noise 模态必v分布 modal power distribution ...
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Because the structure vibrates at some modal, a vibration peak value will appear at its noise frequency spectrum. 这是因为结构以某一阶模态振动时，将在其辐射噪声频谱上出现一个峰值。 - 2
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。 - 3
Finally, Based the analysis of theory modal, a modal testing program has been designed according to the existing test equipments, which prepares for the next testing of the vibration and noise. 在理论模态分析的基础上，根据现有的试验设备设计了合理的试验方案，为下步的振动与噪声的试验做了必要的理论准备。
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