C
A
68 dB
B
B
70 dB
C
A
72 dB
C
A
72 dB
B
B
70 dB
B
B
70 dB
C
A
71 dB
C
A
71 dB
C
A
C
A
E
A
C
A
68 dB
B
B
C
A
72 dB
C
D
C
B
72 dB
C
D
71 dB
C
B
72 dB
B
A
D
B
72 dB
D
B
72 dB