20"

C E 71 dB

D C 71 dB

B A 72 dB

C A 73 dB

C B 73 dB

C C 70 dB

B A 70 dB

B A 70 dB

D B 73 dB

C A 74 dB

C C 73 dB

D A 75 dB

B C 72 dB

B A 71 dB

C B 72 dB

C B 73 dB

C A 72 dB

D C 73 dB

C C 70 dB

D A 72 dB