20"

D A 73 dB

B A 75 dB

B A 72 dB

C A 73 dB

B B 73 dB

B A 70 dB

C A 73 dB

C B 71 dB

D A 74 dB

D A 72 dB

C B 72 dB

C B 73 dB

B C 71 dB

C C 70 dB

C A 73 dB

D A 71 dB

C B 73 dB

B A 73 dB

A A 69 dB

B A 71 dB

C A 72 dB

C A 74 dB

C C 72 dB