Thread Subject: There is a “testsound.wav” test sound signal.

There is a “testsound.wav” test sound signal. Read the sound in using wavread and make the same lengt time vector and you can plot the signal. Use sound to hear it.

You should analyze which sound components are included and after that you should build a band pass filter to pick up only the middle frequency sound. (FFT)

You should build a FIR filter using a Window method. Select the best window type and analyze the differencies. Pass band ripple may be at max -3 db and the minimum attenuation in stop band should be at least -40 db.

You can use Matlab fdatool to help building the filter.

"smile john" <smile@yahoo.com> wrote in message <grmngp$ei6$1@fred.mathworks.com>...
> There is a “testsound.wav” test sound signal. Read the sound in using wavread and make the same lengt time vector and you can plot the signal. Use sound to hear it.
>
> You should analyze which sound components are included and after that you should build a band pass filter to pick up only the middle frequency sound. (FFT)
>
> You should build a FIR filter using a Window method. Select the best window type and analyze the differencies. Pass band ripple may be at max -3 db and the minimum attenuation in stop band should be at least -40 db.
>
> You can use Matlab fdatool to help building the filter.

First of all there isn't a testsound.wav test sound signal

Second, how dare you tell me that I SHOULD analyse this non existing sound file, and build filters. I have much better things to do with my time.

This site is NOT a homework completion service, and never has been. If you have a Matlab technical problem, often someone will help you out. But as sure as hell I for one am not going to waste my time doing your homework, while you sit on your backside playing with your - what do you call it - ah games console will do.

 Dave Robinson

"Dave Robinson" <dave.robinson@somewhere.biz> wrote in message <grnag1$3mh$1@fred.mathworks.com>...
> "smile john" <smile@yahoo.com> wrote in message <grmngp$ei6$1@fred.mathworks.com>...
> > There is a “testsound.wav” test sound signal. Read the sound in using wavread and make the same lengt time vector and you can plot the signal. Use sound to hear it.
> >
> > You should analyze which sound components are included and after that you should build a band pass filter to pick up only the middle frequency sound. (FFT)
> >
> > You should build a FIR filter using a Window method. Select the best window type and analyze the differencies. Pass band ripple may be at max -3 db and the minimum attenuation in stop band should be at least -40 db.
> >
> > You can use Matlab fdatool to help building the filter.
>
> First of all there isn't a testsound.wav test sound signal
>
> Second, how dare you tell me that I SHOULD analyse this non existing sound file, and build filters. I have much better things to do with my time.
>
> This site is NOT a homework completion service, and never has been. If you have a Matlab technical problem, often someone will help you out. But as sure as hell I for one am not going to waste my time doing your homework, while you sit on your backside playing with your - what do you call it - ah games console will do.
>
> Dave Robinson

C'mon Dave get with the times, maybe he's a fan Guitar Hero.