B A 69 dB

B A 69 dB

D B 70 dB

C A 71 dB

C A 71 dB

B A 69 dB

C B 71 dB

C B 71 dB

A B 70 dB

C B 68 dB

C B 72 dB

C A 69 dB

C A 71 dB

C B 70 dB

C B 71 dB

A A 70 dB

E B 71 dB

B A 70 dB

C A 71 dB

B A 69 dB