A B 70 dB

B A 73 dB

A B 70 dB

B B 72 dB

C B 71 dB

C A 71 dB

C A 72 dB

A C 74 dB

B B 71 dB

C A 71 dB

A A 71 dB

C B 72 dB

C A 71 dB

C C 73 dB

B B 69 dB

B B 69 dB

B B 69 dB

A A 71 dB

B B 71 dB

C C 73 dB