A
A
C
B
72 dB
C
B
C
B
72 dB
B
C
72 dB
A
A
69 dB
C
B
66 dB
B
C
C
B
72 dB
C
D
72 dB
C
A
72 dB
C
B
C
B
C
A
71 dB