20"

B E 71 dB

B B 70 dB

B D 71 dB

C D 70 dB

C D 70 dB

C E 71 dB

D C 75 dB

A B 71 dB

B E 71 dB

C B 71 dB

B A 70 dB

B E 71 dB

C E 70 dB

B E 71 dB

B A 70 dB

B A 71 dB

C A 72 dB

B D 69 dB

C E 70 dB

C E 71 dB

D A 73 dB

D B 72 dB