C
D
C
C
C
C
C
C
C
C
C
B
C
C
73 dB
C
C
73 dB
C
C
C
C
C
C
C
C
C
D
71 dB
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
D
71 dB