hi,
thanks to Michael & dan... i've got the answer now.
sorry for this real newbie question but i never studied dsp... should i ??
cheers,
yves
-------- Original Message -------- Subject: Re: [PD-dev] I need a formula Date: Mon, 3 Jun 2002 10:28:26 -0400 (EDT) From: Michael Casey mkc@media.mit.edu To: Yves Degoyon ydegoyon@free.fr
Center Frequency 0.5 * (Fmax + Fmin) Q factor = ----------------- = -------------------- Bandwidth (Fmax - Fmin)
The Heisenberg uncertainty principle dictates that a high Q filter (narrow frequency selectivity) will have low temporal resolution and that high temporal resolution will have low frequency selectivity.
It's always a trade off...
Best regards,
--- Michael Casey, Research Scientist MERL, 201 Broadway 8th floor Cambridge MA 02139, USA. tel:+1.617.621.7535 http://www.merl.com/people/casey http://www.media.mit.edu/~mkc
On Mon, 3 Jun 2002, Yves Degoyon wrote:
hi,
i'm trying to use a bp~ object so that it can filter frequencies betweem Fmin and Fmax.
i think the central frequency should be set to ( Fmin+Fmax )/2, but what value should be given to the Q factor ??
thanx.
yves/
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