C
A
72 dB
A
B
69 dB
B
A
71 dB
C
A
70 dB
B
C
A
A
B
A
71 dB
B
D
B
75 dB
B
A
B
75 dB
A
B
74 dB
A
B
C
C
72 dB
D
B
70 dB
D
B
70 dB