C
B
C
A
C
A
73 dB
C
A
C
B
70 dB
C
B
70 dB
C
A
75 dB
C
A
F
E
D
A
73 dB
C
A
C
A
73 dB
D
A
75 dB
C
A
73 dB
A
C
A
73 dB
C
A
71 dB