C
B
C
C
B
C
B
C
B
C
C
E
E
C
B
C
C
C
C
72 dB
C
C
72 dB
C
C
C
B
C
B
C
C
C
C
72 dB
B
C
B
B
B
C
C
72 dB
C
C
C
C
72 dB
C
C