B
B
75 dB
B
B
75 dB
C
A
74 dB
C
A
74 dB
B
B
75 dB
C
A
74 dB
B
B
75 dB
B
A
C
A
74 dB
C
A
74 dB
B
A
74 dB
C
A
B
B
C
B
73 dB
A
75 dB
C
B
73 dB
D
A
75 dB
B
A
74 dB
C
B
A
D
A
75 dB
A
D
A
75 dB
C
A
74 dB