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