Question

pass and a high pass filter bandwidths 4.5 The recording of the vowel "ahhh" is filtered using a low pass and a high whose shapes are given in Figure 4.38. FIGURE 4.38 Filter shapes for Question 4.5. Magnitude 0. 41 0 2000 4000 6000 8000 10000 Frequency (Hz) a. In Figure 4.39, identify which filter produces each output signal shown. b. Since the two filters in Figure 4.38 cover all frequencies of interest, the two sig nals in Figure 4.39 carry most of the information in the original signal. Sketch an approximation to the original vowel signal using the signals in Figure 4.39. REVIEW QUESTIONS | 137 FIGURE 4.39 Filter outputs for Question 4.5 Amplitude 2000 2050 2100 2150 2200 2250 2300 2350 2400 2450 2500 Time Pass Filter Output Amplitude -0.4 -0.5 2000 2050 2100 2150 2200 2250 2300 2350 2400 2450 2500 Time Pass Filter Output *For clarity, the envelopes rather than the individual samples of the signals are plotted.

Answer 1

415a) 1st diagram of fig 4.39 is high and diagram of fiz 4.39 is low vowel signal only have amplitude frequencies pass filter. pass filter. for some particular mag bara en fra order of a Freg of in