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