My false perception of comb filter, and a question..
Posted: Mon Jul 11, 2022 2:14 pm
Hi,
After all this time working with them, i just realize something with comb filter..
Seeing the bode plot or others representation. I was thinking that a comb filter attenuate strongly one or 2 band,
then attenuate less when going to high frequency.
Like this :
But i just realize that it's some illusion from the representation.
If i try to correct the image here's what really happens :
The attenuation band become less larger, but they continue to cancel the sound completely at some frequency ?
But is it really the case in a discrete sample rate system ?
Or is there some point where the comb will not really attenuate in the high ?
Maybe because the cut become to small and have less chance to be the same as an input frequency ?
After all this time working with them, i just realize something with comb filter..
Seeing the bode plot or others representation. I was thinking that a comb filter attenuate strongly one or 2 band,
then attenuate less when going to high frequency.
Like this :
But i just realize that it's some illusion from the representation.
If i try to correct the image here's what really happens :
The attenuation band become less larger, but they continue to cancel the sound completely at some frequency ?
But is it really the case in a discrete sample rate system ?
Or is there some point where the comb will not really attenuate in the high ?
Maybe because the cut become to small and have less chance to be the same as an input frequency ?