C
C
C
E
C
D
C
70 dB
C
C
D
C
70 dB
C
D
C
70 dB
E
C
C
C
C
D
C
C
C
E
C
D
C
C
C
C
72 dB
E
C
C
C
C
C
C
C
E
C
E
C
D
C
72 dB