Finite Impulse Response Filter Design - Digital Signal Processing: Fundamentals and Applications - page 249

Table 7.9 FIR Filter Coefficients in Example 7.10 (Hamming Window)
Bham: FIR Filter Coefficients (Hamming Window)

b 0 ¼ b 24 ¼ 0.002680 b 1 ¼ b 23 ¼ 0.001175

b 2 ¼ b 22 ¼ 0.007353 b 3 ¼ b 21 ¼ 0.000674

b 4 ¼ b 20 ¼ 0.011063 b 5 ¼ b 19 ¼ 0.004884

b 6 ¼ b 18 ¼ 0.053382 b 7 ¼ b 17 ¼ 0.003877

b 8 ¼ b 16 ¼ 0.028520 b 9 ¼ b 15 ¼ 0.008868

b 10 ¼ b 14 ¼ 0.296394 b 11 ¼ b 13 ¼ 0.008172

b 12 ¼ 0.462500

1 x 10 4

0.5

0

-0.5

-1

0 200 400 600 800 1000 1200 1400 1600 1800 2000

1 x 10 4

0.5

0

-0.5

-1

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Sample number

FIGURE 7.19A
Original speech and processed speech using the bandpass filter.

For comparison, the original speech and bandpass filtered speech are plotted in Figure 7.19A , where the
bandpass frequency components contain a small portion of speech energy. Figure 7.19B shows a comparison
indicating that low and high frequencies are removed by the bandpass filter.