C
A
C
A
C
A
7 dB
D
C
7 dB
C
A
71 dB
D
C
69 dB
C
A
C
A
C
A
C
A
C
A
C
A
7 dB
B
A
7 dB
C
A
7 dB
C
A
B
A
C
A
7 dB
B
A
7 dB
D
C
7 dB
C
A
72 dB
C
A
C
A
7 dB
C
A
7 dB
C
A
7 dB