C B 74 dB

C A 73 dB

C A 74 dB

D B 72 dB

C A 72 dB

C A 72 dB

B A 70 dB

C A 74 dB

C A 72 dB

C B 73 dB

B A 74 dB

C C 73 dB

B C 75 dB

C B 73 dB

C A 71 dB

C A 73 dB

D A 74 dB

B C 75 dB

B A 73 dB

E B