D A 71 dB

A B 69 dB

C C 72 dB

C A 73 dB

C A 73 dB

C C 73 dB

C C 74 dB

C B 72 dB

C C 74 dB

B B 70 dB

B A 72 dB

C C 72 dB

D B 73 dB

A B 71 dB

B A 71 dB

B B 72 dB

C A 73 dB

B A 75 dB

C C 75 dB

C B 73 dB