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