C
A
C
A
70 dB
B
A
70 dB
C
A
7 dB
B
A
C
A
E
C
74 dB
D
B
7 dB
C
A
7 dB
E
E
E
E
C
A
7 dB
A
B
71 dB
C
A
C
A
7 dB
C
B
7 dB
B
A
7 dB