20"

C B 73 dB

C C 71 dB

A A 73 dB

E E 75 dB

D B 72 dB

C B 72 dB

C B 73 dB

D A 75 dB

C B 73 dB

C C 74 dB

C B 72 dB

C A 70 dB

B B 72 dB

D C 70 dB

B D 70 dB

A A 73 dB

C B 71 dB

C C 74 dB

C E 71 dB