DSP Blockset

Part 4 -- Looking at Filtering Results

Now you can listen to and look at the results of the fixed-point filter you designed and implemented.

22. Type

• soundsc(yout,Fs)

1. at the command line to hear the output of the filter. You should hear a voice say "MATLAB." The noise portion of the signal should be close to inaudible.

23. Type

• figure

  specgram(yout, 256, Fs);colorbar

1. at the command line. You can compare the input and output signals side-by-side.
   
   

   From the colorbars at the side of each spectrogram, you can see that the noise has been reduced by about 40 dB.

Part 3 -- Building a Model to Filter a Signal

Analog Filter Design Block