C
A
71 dB
C
A
7 dB
A
B
71 dB
C
B
7 dB
B
A
71 dB
B
A
6 dB
C
A
C
A
71 dB
A
B
A
B
7 dB
B
A
7 dB
C
A
C
B
70 dB
C
A
C
B
7 dB
B
A
71 dB
C
A
71 dB
C
A
7 dB
C
A
7 dB
C
A