D C 73 dB

B A 71 dB

B B 71 dB

D A 73 dB

D A 73 dB

C B 73 dB

B B 69 dB

C A 70 dB

C A 71 dB

D A 71 dB

C A 70 dB

B B 68 dB

C A 73 dB

C B 73 dB

C B 71 dB

D A 72 dB

A B 71 dB

D B 72 dB

B A 71 dB