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