19"

D A 73 dB

B B 71 dB

A B 73 dB

C C 72 dB

C B 72 dB

A B 72 dB

C B 71 dB

B A 71 dB

B A 69 dB

C B 71 dB

C B 72 dB

C B 73 dB

D A 67 dB

B A 71 dB

C B 73 dB

C A 73 dB

C B 71 dB

C C 68 dB

A A 73 dB

C B 71 dB

D C 70 dB

C C 70 dB

B B 73 dB