The conclusion is that Matlab enabled us to use its built in fucntion for filtering design purposes, such as fir1 and butter which is introduced to us in this DSP 3 lab. This lab also shows us the difference between designing a FIR filter and also an IIR filter.
From the results and by comparing the SNR values , we can conclude that FIR filters produce much better filter than the IIR.
But in mathematically FIR needs more computation than the IIR filter , the outcomes may have slight difference in quality of sound produced but the difference do not prove to be important since it is so slightest. Therefore the IIR is more efficient compare to FIR in this case. Therefore , in choosing the filter we wanted to use , we must consider what we want , and what is the criteria we are looking for , the outcomes , the computation complexity and many other important points before implementing any kind of design.