CF-5200 Frequently Asked Questions
Question number FAQ-0541
The overall value obtained from the standard FFT analysis differs by about 4 dB from the overall value obtained from the 1/3 octave analysis.
It changes depending on the signal.
In the case of octave analysis, leakage from adjacent bands is included (due to the filter's characteristics being broad), which tends to result in larger values compared to the overall values obtained from a standard FFT.
Displaying 15 bands from the spectrum.
Components other than the 15 bands are cut off, making the overall smaller.
Chapter of the relevant instruction manual
4.3.2 Octave Analysis
Last updated: 2000-04-10