C
D
75 dB
B
D
B
75 dB
C
B
72 dB
C
B
75 dB
C
B
72 dB
C
C
75 dB
C
B
C
B
75 dB
C
B
75 dB
C
B
75 dB
C
B
7 dB
B
C
75 dB
C
C
75 dB
C
C
75 dB
C
B
75 dB