Closed kurtwerbrouck closed 11 months ago
Hi @kurtwerbrouck ,
The result of FFT when you get sprectrum should be divided by sqrt(N), But we need 20*log10(abs(spectrum)), where abs(spectrum) = sqrt(real^2 + imag^2)/sqrt(N);
But, we can make so: 20log10(abs(spectrum)) = 10log10(abs(spectrum)^2) = 10*loag10((real^2 + imag^2)/N);
Regards, Dmitry
Hello
I have 2 question on the next formule:
y2_cf[i] = ((y_cf[i 2 + 0] y_cf[i 2 + 0] + y_cf[i 2 + 1] y_cf[i 2 + 1])/N);
What is the meaning of devide by N in above formule.
Why is there not sqrt() function ?
Thanks