19"

D B 74 dB

C B 70 dB

B B 71 dB

D B 72 dB

C B 71 dB

C A 70 dB

B A 71 dB

C A 69 dB

C C 71 dB

C D 71 dB

B B 73 dB

D A 74 dB

C C 74 dB

B A 72 dB

B B 71 dB

D B 72 dB

C B 72 dB

C C 71 dB

B A 72 dB

C C 71 dB