【81】Pltviewer中1/3 octave and mean 1/3 octave filter的区别？

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)