sel sound exposure level
声音暴露水平
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The wave form and the spectrum of impact force as well as the variation in sound exposure level (SEL) at a fixed point were measured which representing the relative changes of the ringing noise.
对一些板和梁进行了撞击试验，测量了撞击力随时间变化的波形及其频谱。
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