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