20"

C E 71 dB

C C 71 dB

B C 71 dB

C D 72 dB

C C 72 dB

C B 72 dB

A A 72 dB

C A 72 dB

A B 72 dB

A B 72 dB

A B 73 dB

B C 72 dB

D A 73 dB

C A 72 dB

C B 72 dB

D B 73 dB

D B 73 dB

C A 73 dB

C E 71 dB

C C 72 dB

A B 72 dB

C A 72 dB

A A 71 dB

B B 71 dB