20"

C C 73 dB

C B 71 dB

C C 74 dB

C B 71 dB

C A 73 dB

B A 70 dB

B C 72 dB

D B 71 dB

C B 71 dB

C A 70 dB

D B 75 dB

C C 71 dB

A A 70 dB

D A 72 dB

B D 70 dB

C E 71 dB

C A 71 dB

C A 72 dB

D B 72 dB

C A 73 dB

C C 73 dB

C B 72 dB

B E 73 dB

D B 71 dB