4. In audio systems, frequencies in the range of a few Hz to 100 Hz, are called bass notes. Sometimes, a bass booster su

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4 In Audio Systems Frequencies In The Range Of A Few Hz To 100 Hz Are Called Bass Notes Sometimes A Bass Booster Su 1 (72.11 KiB) Viewed 23 times

4. In audio systems, frequencies in the range of a few Hz to 100 Hz, are called bass notes. Sometimes, a bass booster such as the one in Figure 4 is used to emphasize bass guitars and drums. w R2 w w RI R3 C HH Vout Figure 4 With reference to Figure 4 (a) determine the order (e.g. first, second third etc) of the active filter. (3 marks) (b) Using symbolic equations, determine the frequency response H of the active filter. (10 marks) (c) Using symbolic equations, determine (i) gain at low frequencies (or DC gain). (ii) gain at high-frequencies. (iii) cut-off frequency. (hint: simply look at the denominator of the frequency response) (7 marks) (d) On your answer book, sketch the amplitude plots. (5 marks)