E
C
D
C
72 dB
C
C
C
C
C
B
E
C
C
C
C
B
E
C
C
C
D
C
72 dB
C
C
C
C
C
B
C
C
C
C
C
C
C
C
E
C
D
C
72 dB
C
C
71 dB
E
C