Hi, I have a theoretical question about FFT. I’m trying to use fft to process some datas that I got with an accelerometer. I’ve already applied a low pass filter to my signal to reduce noise and also applied a flat top window in order to have the most accurate amplitude possible. Doing this I obtain a quite nice spectrum with only one peak at the frequency that I’m interested in, which is what I’m supposed to obtain by the way. Now the question is, and it’s a question that probably comes from my low understanding of FFT, is the FFT peak amplitude supposed to be the same value as the max amplitude of the original signal? Or is it supposed to be something else? FFT is something that I’ve wrapped my head around only in the last few weeks for a uni project without really knowing much about it. Thank you in advance for you help.Hi, I have a theoretical question about FFT. I’m trying to use fft to process some datas that I got with an accelerometer. I’ve already applied a low pass filter to my signal to reduce noise and also applied a flat top window in order to have the most accurate amplitude possible. Doing this I obtain a quite nice spectrum with only one peak at the frequency that I’m interested in, which is what I’m supposed to obtain by the way. Now the question is, and it’s a question that probably comes from my low understanding of FFT, is the FFT peak amplitude supposed to be the same value as the max amplitude of the original signal? Or is it supposed to be something else? FFT is something that I’ve wrapped my head around only in the last few weeks for a uni project without really knowing much about it. Thank you in advance for you help. Hi, I have a theoretical question about FFT. I’m trying to use fft to process some datas that I got with an accelerometer. I’ve already applied a low pass filter to my signal to reduce noise and also applied a flat top window in order to have the most accurate amplitude possible. Doing this I obtain a quite nice spectrum with only one peak at the frequency that I’m interested in, which is what I’m supposed to obtain by the way. Now the question is, and it’s a question that probably comes from my low understanding of FFT, is the FFT peak amplitude supposed to be the same value as the max amplitude of the original signal? Or is it supposed to be something else? FFT is something that I’ve wrapped my head around only in the last few weeks for a uni project without really knowing much about it. Thank you in advance for you help. fft, signal processing MATLAB Answers — New Questions

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