... power sound spectrum 声功率谱 sound spectrum measurement 声谱测量 sound spectrum level 声谱级 ...
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sound pressure spectrum level 声压谱级
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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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