频率(Hz)

1号误差点

2号误差点

控前(dB)

控后(dB)

衰减量(dB)

控前(dB)

控后(dB)

衰减量(dB)

20

106.5

75.1

31.4

108.1

76.2

31.9

40

68.2

44.4

23.8

76.3

46.2

30.1

60

53.5

43.2

10.3

52.6

38.6

14.0

80

54.6

45.3

9.3

52.0

47.2

4.8

100

69.9

54.8

15.1

66.4

57.8

8.6

120

52.2

50.0

2.2

52.4

43.4

9.0

140

36

47.0

−11.0

44.5

44.5

0.0

160

42.9

32.3

10.6

38.7

35.5

3.2

180

32.8

45.0

−12.2

37.5

40.9

−3.4

200

49.7

46.7

3.0

45.9

49.0

−3.1