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