18"

C A 72 dB

C B 70 dB

C A 73 dB

B E 70 dB

D B 72 dB

D B 73 dB

C D 71 dB

C E 72 dB

B B 71 dB

B B 71 dB

C C 72 dB

C A 71 dB

B E 71 dB

C C 71 dB

D C 70 dB

C A 72 dB

C B 70 dB

C A 72 dB

B B 71 dB

C B 71 dB