A
B
69 dB
C
A
75 dB
A
B
69 dB
C
A
75 dB
A
B
69 dB
A
B
C
A
75 dB
C
A
75 dB
C
A
C
B
C
A
71 dB
C
B
75 dB
A
B
69 dB