B
A
72 dB
B
A
72 dB
C
A
72 dB
B
A
72 dB
C
A
C
A
72 dB
B
A
C
A
72 dB
B
A
72 dB
B
A
72 dB
B
A
C
A
72 dB
C
A
72 dB
C
B
72 dB
C
A
72 dB
C
B
72 dB
C
B
B
D
72 dB