20"

B C 73 dB

C A 72 dB

D C 72 dB

D C 73 dB

B A 72 dB

B C 73 dB

C B 70 dB

B A 72 dB

B A 73 dB

C C 73 dB

C C 73 dB

E E 71 dB

E E 72 dB

E E 75 dB

C D 72 dB

A B 69 dB

B D 69 dB

D C 73 dB