Re: help with hz to octave conversion for dsp
Hi BJ,
If I follow correctly, it'll do almost what you need. You know the centre frequency, fc, and bandwidth, w, so the filter Q is just fc/w. Converting Q to octave bandwidth, n, you get:
n = 2 * log((sqrt(4Q^2+1)+1)/2Q) / log(2)
So, for fc=2140, w=1248, the Q is 1.715 and the octave bandwidth is 0.830.
FWIW, though, I agree with Scott's advice to measure and compare the results.
Nick
