A A 69 dB

A A 69 dB

A B 71 dB

A B 70 dB

A B 69 dB

A B 72 dB

A B 69 dB

A B 69 dB

D A 72 dB

A A 72 dB

C A 71 dB

B A 71 dB

C A 71 dB

B B 68 dB

C B 68 dB

C A 71 dB

B A 71 dB