Use the MATLAB function file you created to create an echo signalusing your original speech signal and a constant attenuation. Youwill need to create a signal that is a scaled version of theoriginal and add it to the original with the desired offset intime. Experiment with different values for the time delay andattenuation. Listen to the resulting signals and note yourobservations.
1. Generate a 0.25 second echo effect. Let alpha = 0.65
2. Use a non-constant attenuation function, such as an exponential:alpha(t)=Ae^-t/tau. Determine values of A and tau that make aninteresting effect.
3. Use several different delays and amplitudes to get a variety ofechoes.
4. Use an oscillatory attenuation function, such asalpha(t)=Acos(wt)