D
A
72 dB
B
A
72 dB
D
C
70 dB
C
A
7 dB
B
A
D
A
7 dB
B
A
7 dB
A
D
A
7 dB
A
A
70 dB
C
A
A
A
A
A
7 dB
C
A
7 dB
A
D
A
72 dB
C
B
7 dB
B
A
72 dB
C
A
C
B
72 dB
C
B
D
B
72 dB
C
B
7 dB