C
C
C
B
73 dB
C
B
73 dB
B
C
73 dB
C
C
C
C
72 dB
C
C
C
C
C
C
C
C
C
C
C
C
C
73 dB
C
C
B
73 dB
B
C
73 dB
C
C
C
C
C
C
C
C
C
C
C
B
75 dB