C
C
B
C
A
73 dB
B
C
B
C
B
70 dB
C
A
73 dB
C
B
C
A
71 dB
D
B
73 dB
C
B
C
A
B
C
B
C
A
C
B
C
B
C
B
C
B
72 dB
D
A
73 dB
C
B
C
B
C
B
C
A
71 dB