B A 70 dB

C B 75 dB

C B 72 dB

D B 72 dB

D B 73 dB

D B 72 dB

D B 72 dB

D D 75 dB

C C 74 dB

E A 75 dB

C B 73 dB

C A 70 dB

C B 75 dB

C A 73 dB

C A 73 dB

E C 75 dB

C A 73 dB

C B 72 dB

C A 75 dB

C B 74 dB