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