C B 75 dB

B A 70 dB

D B 72 dB

C A 72 dB

D B 72 dB

C B 71 dB

B B 73 dB

B A 71 dB

C A 73 dB

C A 72 dB

D B 72 dB

B A 70 dB

C A 72 dB

C A 74 dB

B A 71 dB

C A 71 dB

B A 71 dB

D B 74 dB

C B 73 dB