20"

B B 72 dB

C A 72 dB

D C 70 dB

C A 73 dB

B A 73 dB

B B 72 dB

C A 70 dB

C A 74 dB

C E 71 dB

C A 70 dB

B B 73 dB

C A 73 dB

C B 71 dB

C A 71 dB

C B 74 dB

C C 72 dB

B B 75 dB

D B 72 dB

D B 73 dB

A C 72 dB

C C 73 dB

D A 74 dB

D C 70 dB

D C 73 dB