B
A
C
B
69 dB
B
A
68 dB
C
B
F
C
70 dB
E
C
70 dB
C
A
C
A
68 dB
C
B
69 dB
C
A
68 dB
C
B
69 dB
C
B
69 dB
C
E
67 dB
C
A
6 dB