Thread Subject: plotting a graph of a voice signal

Hello All,

i got a voice signal into matlab using the .wav format that windows supports. i used the wavread function available in matlab. please can one tell me how to plot a frequency graph of this voice signal so that i can see it.

Thanks

"Arisa Onwuka" <onwuka.arisa@ieee.org> wrote in message <gmp3u5$ck3$1@fred.mathworks.com>...
> Hello All,
>
> i got a voice signal into matlab using the .wav format that windows supports. i used the wavread function available in matlab. please can one tell me how to plot a frequency graph of this voice signal so that i can see it.
>
> Thanks

Maybe 'doc fft' could help ...

"Arisa Onwuka" <onwuka.arisa@ieee.org> wrote in message <gmp3u5$ck3$1@fred.mathworks.com>...
> Hello All,
>
> i got a voice signal into matlab using the .wav format that windows supports. i used the wavread function available in matlab. please can one tell me how to plot a frequency graph of this voice signal so that i can see it.
>
> Thanks
try the fft function..but use the absolute value of the fft to see the magnitude only, and take half the vector since its an even function, and so repeats itself..
Regards,