C
A
70 dB
C
A
70 dB
C
A
70 dB
B
B
69 dB
D
A
70 dB
D
A
70 dB
C
A
C
A
B
B
69 dB
C
A
C
A
C
B
C
A
C
A
70 dB
B
B