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标题: 【81】Pltviewer中1/3 octave and mean 1/3 octave filter的区别？ [打印本页]
作者: 张吉健 时间: 2015-7-13 17:54
标题: 【81】Pltviewer中1/3 octave and mean 1/3 octave filter的区别？
本帖最后由 张吉健 于 2015-7-13 17:56 编辑
Q: Pltviewer中1/3 octave and mean 1/3 octave filter的区别？
A：[size=10.0000pt](1) For the amplitude in 1/3 octave band : integration of the quantity on each 1/3 octave bands[size=10.0000pt]
(2) For the amplitude in mean 1/3 octave band : integration of the quantity on each 1/3 octave bands divided by the size of the band[size=10.0000pt]
(3) For the dB_pressure in 1/3 octave band : integration (without dB operator) on each 1/3 octave bands, then the dB_operator is applied on the value (10log10(value/ref)[size=10.0000pt]
(4) For the dB_pressure in mean 1/3 octave band : integration (without dB operator) on each 1/3 octave bands divided by the size of the band, then the dB_operator is applied on the value (10log10(value/ref)
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