C
B
C
C
C
E
B
C
B
C
C
E
B
E
C
C
C
73 dB
C
C
C
C
C
B
C
B
D
C
71 dB
C
B
C
B
C
C
D
D
72 dB
C
C
C
C
C
C
E
C
E
B
74 dB