Info
This is archived material from the Federal Bureau of Investigation (FBI) website. It may contain outdated information and links may no longer function.

Tables 9a and 9b

Table 9a: Total harmonic distortion values for the clipped 1 kHz sine wave files and the restored versions using both programs

Amount Clipped (dB)

Bits/
Sample

Sample
Frequency
(kHz)

Clipped
(%)

Program #1
(%)

Program #2
(%)

+3

8

8

15.90

N/A

2.89

+6

8

8

15.90

N/A

2.89

+9

8

8

15.90

N/A

2.89

+12

8

8

15.90

N/A

2.89

+3

8

11.025

13.00

0.55

5.34

+6

8

11.025

22.10

0.92

11.60

+9

8

11.025

26.90

0.93

9.27

+12

8

11.025

29.20

1.26

7.09

+3

16

11.025

12.80

0.52

4.98

+6

16

11.025

22.00

0.92

11.60

+9

16

11.025

26.80

0.96

9.56

+12

16

11.025

29.20

1.26

7.04

+3

8

16

14.60

0.30

1.78

+6

8

16

22.60

0.30

16.80

+9

8

16

31.30

1.04

3.84

+12

8

16

31.30

1.04

3.84

+3

16

16

14.30

0.11

1.57

+6

16

16

22.10

0.46

15.00

+9

16

16

31.30

1.10

3.78

+12

16

16

31.30

1.10

3.78


Table 9b: Total harmonic distortion (THD) values for the clipped 1 kHz sine wave files and the reformatted restored versions using both programs

Amount Clipped (dB)

Native*

Reformatted

Clipped
(%)

Program #1
(%)

Program #2
(%)

Bits/
Sample

Sample
Frequency
(kHz)

Bits/
Sample

Sample
Frequency
(kHz)

+3

8

8

16

8

15.90

N/A

2.77

+6

8

8

16

8

15.90

N/A

2.77

+9

8

8

16

8

15.90

N/A

2.77

+12

8

8

16

8

15.90

N/A

2.77

+3

8

8

16

44.1

15.90

13.60

9.94

+6

8

8

16

44.1

15.90

13.60

9.94

+9

8

8

16

44.1

15.90

13.60

9.94

+12

8

8

16

44.1

15.90

13.60

9.94

+3

8

11.025

16

11.025

13.00

0.52

5.28

+6

8

11.025

16

11.025

22.10

0.91

11.70

+9

8

11.025

16

11.025

26.90

0.95

9.42

+12

8

11.025

16

11.025

29.20

1.28

7.06

+3

16

11.025

16

44.1

12.80

13.00

12.10

+6

16

11.025

16

44.1

22.00

22.30

17.90

+9

16

11.025

16

44.1

26.80

28.60

28.10

+12

16

11.025

16

44.1

29.20

32.60

32.40

+3

8

16

16

16

14.60

0.46

1.57

+6

8

16

16

16

22.60

0.46

16.80

+9

8

16

16

16

31.30

1.10

3.79

+12

8

16

16

16

31.30

1.10

3.79

+3

16

16

16

44.1

14.30

14.40

3.48

+6

16

16

16

44.1

22.10

21.60

17.50

+9

16

16

16

44.1

31.30

30.40

30.70

+12

16

16

16

44.1

31.30

30.40

30.70

*Native THD has no harmonic components.