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Hello all, I need some help with a problem that Im having. Im currently analyzing a calibration signal and when I perform the FFT signal analysis I find a peak with amplitud 93.1dB @998,66Hz and 2 peak sides of aprox. 87dB (marked in the picture attached). Then i performed a Third octave analysis and I found that the Band related to 1000Hz has an amplitude of 93.1dB. My question is: just the sum of these 3 bins gives me an amplitude of aprox 99dB, why the amplitude of the band is 93.1dB? What Im misunderstanding? Thank you so much for your help.
We are seeing that you posted the question in two different forums. To provide you a better support I´ll be closing this forum and we will work on the other one.
