Xiox
May6-04, 02:28 AM
Hi, I'm new into this subject.
I'm trying to understand how a low pass filter (where the frequency f is from 0 Hz to f_u ) for a speacker is working. The fuction for the low pass filter is \mid H \mid = U_out / U_in, that is
\mid H \mid = R / \sqrt{R^2 + ( \omega L )^2}
where
\omega = 2 \pi f
That I don't really understand is how f \rightarrow 0 \Rightarrow \mid H \mid \rightarrow 1 = \mid H \mid_max (f is the frequency) and f \rightarrow \infty \Rightarrow \mid H \mid \rightarrow 0 . I believe that I would need a graph.
I'm trying to understand how a low pass filter (where the frequency f is from 0 Hz to f_u ) for a speacker is working. The fuction for the low pass filter is \mid H \mid = U_out / U_in, that is
\mid H \mid = R / \sqrt{R^2 + ( \omega L )^2}
where
\omega = 2 \pi f
That I don't really understand is how f \rightarrow 0 \Rightarrow \mid H \mid \rightarrow 1 = \mid H \mid_max (f is the frequency) and f \rightarrow \infty \Rightarrow \mid H \mid \rightarrow 0 . I believe that I would need a graph.