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