C
B
69 dB
C
A
70 dB
C
A
70 dB
C
A
70 dB
C
A
C
A
70 dB
C
A
70 dB
C
A
C
A
70 dB
C
A
70 dB
C
A
70 dB
C
B
70 dB
C
A
C
A
C
A
C
A
70 dB
C
A
70 dB