C
A
69 dB
C
B
68 dB
C
B
70 dB
C
D
68 dB
C
B
C
B
C
B
70 dB
C
C
69 dB
C
B
68 dB
C
B
70 dB
C
B
70 dB
C
B
68 dB
C
B
73 dB
C
B
73 dB
C
C
C
B
C
B
C
B
C
B
C
A
C
A
70 dB
C
C
69 dB
C
B
68 dB
C
B
68 dB