B A 71 dB

C B 71 dB

D B 71 dB

B C 71 dB

B C 71 dB

A C 70 dB

C A 71 dB

B A 71 dB

C A 68 dB

D B 71 dB

C A 72 dB

C B 72 dB

C C 67 dB

C B 72 dB

D C 72 dB

B A 72 dB

E C 71 dB

E C 71 dB

B C 71 dB

C A 68 dB