B C 71 dB

B C 71 dB

C B 71 dB

C B 71 dB

B B 71 dB

C B 69 dB

B A 69 dB

B A 69 dB

A A 69 dB

B A 70 dB

B A 70 dB

B A 70 dB

B A 70 dB

C A 69 dB

A B 69 dB

B A 70 dB

B A 70 dB

A B 70 dB

C C 71 dB

C C 72 dB