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+//Example 2.5 page 28
+//Given the DSP system shown in Figures 2.16 to 2.18, where a sampling
+//rate of 16,000 Hz is used and the anti-aliasing filter is a second-order
+//Butterworth lowpass filter with a cutoff frequency of 3.4 kHz, determine
+//the percentage of aliasing level at the cutoff frequency.
+clc,clear,close;
+fs=16000,fc = 3400;//Hz 
+n =2;
+
+fa = 3400;//Hz, aliasing frequency
+aliasing_noise = (1+(fa/fc)^(2*n))^(.5) / (1+((fs-fa)/fc)^(2*n))^(.5) * 100;
+disp("Aliasing Noise Level = "+string(aliasing_noise)+"%" )
+\ No newline at end of file