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