B
A
6 dB
B
A
72 dB
D
B
72 dB
B
A
B
A
7 dB
B
A
7 dB
B
A
71 dB
B
A
B
A
7 dB
B
C
68 dB
B
A
C
A
7 dB
B
A
7 dB
E
D
7 dB
C
A
72 dB
B
C
70 dB
B
C
E
B
75 dB
D
C
7 dB
C
B
C
69 dB
D
C
69 dB
C
E
D
75 dB