Central frequency of the octave band (Hz)

63

125

250

500

1000

2000

4000

8000

Acceptable L [dBZ] for L_AF,eq = 35

55

50

45

40

35

30

28

28

Acceptable L [dBZ] for L_AF,eq = 40

59

54

50

45

40

35

33

33

Acceptable L [dBZ] for L_AF,eq = 45

63

58

54

50

45

41

38

38