A
B
69 dB
C
A
69 dB
A
B
A
A
69 dB
B
D
A
B
69 dB
C
A
69 dB
B
A
C
A
69 dB
B
A
69 dB
C
A
69 dB
A
A
C
A
C
A
69 dB
B
A
69 dB
B
A
B
A
C
A
69 dB
C
D
68 dB
C
C
71 dB
C
A
69 dB
B
A
69 dB
A
B
69 dB