C
A
70 dB
B
D
C
70 dB
D
A
70 dB
B
B
C
A
69 dB
D
C
68 dB
D
C
70 dB
C
A
C
B
70 dB
C
A
69 dB
D
C
68 dB
E
B
C
A
69 dB
C
E
C
C
B
70 dB
C
B
C
B
D
C
69 dB
D
B
69 dB
C
A
70 dB
C
C
68 dB