C
A
71 dB
A
B
69 dB
C
A
71 dB
C
B
71 dB
C
A
72 dB
B
69 dB
C
A
71 dB
C
A
71 dB
B
72 dB
A
B
A
C
B
B
70 dB
C
C
A
71 dB
B
71 dB
B
B
71 dB
A
C
69 dB
D
B
72 dB
C
B
A
C
69 dB
B
B
72 dB
A
A
7 dB
D
B
71 dB
C
A
71 dB