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