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