C
C
70 dB
E
E
C
C
C
C
70 dB
C
C
70 dB
C
C
C
C
70 dB
C
B
69 dB
C
C
70 dB
C
C
C
C
70 dB
C
C
70 dB
C
C
D
C
73 dB
C
C
C
C
C
C
C
C
C
C
70 dB
C
B
69 dB
C
C
70 dB
C
C
70 dB
C
C
C
B
69 dB