C A 72 dB

A B 72 dB

C B

C B 73 dB

C A 70 dB

C B 73 dB

C A 73 dB

C A 72 dB

C A 70 dB

C A

A B 72 dB

C B 72 dB

B B 70 dB

C A 72 dB

D B 73 dB

A B 72 dB

C A 69 dB

B A 69 dB

C B 72 dB

C B 71 dB