C B

C B 73 dB

B B 73 dB

C A 73 dB

C A

C B 72 dB

C B 71 dB

C A 73 dB

C A 72 dB

C A 71 dB

D B 72 dB

D B 72 dB

C A 70 dB

B C 73 dB

D B 72 dB

C A 72 dB

C B 72 dB

E A 71 dB

D B 72 dB

C C 73 dB