20"

B B 71 dB

C B 72 dB

C A 75 dB

C C 72 dB

C C 72 dB

B B 73 dB

D B 73 dB

D B 73 dB

B B 71 dB

A B 71 dB

B B 69 dB

D D 71 dB

C B 71 dB

D A 73 dB

D A 73 dB

D A 74 dB

E E 73 dB

A B 69 dB

A C 72 dB

C B 71 dB

C E 73 dB

A A 72 dB

D B 73 dB