C B 74 dB

C C 73 dB

C C 73 dB

C B 75 dB

D C 74 dB

C B 72 dB

C B 74 dB

D A 75 dB

C A 70 dB

C B 75 dB

C A 72 dB

D B 73 dB

C A 73 dB

C C 75 dB

C A 71 dB

C A 75 dB

C A 70 dB

B A 73 dB

D B 73 dB

C C 72 dB