20"

C B 71 dB

B A 72 dB

C A 71 dB

B B 70 dB

B A 69 dB

B B 71 dB

B A 73 dB

E C 71 dB

B D 73 dB

C A 74 dB

C B 71 dB

B A 72 dB

C A 73 dB

C A 73 dB

D E 71 dB

C A 73 dB

A A 69 dB

C C 69 dB

A B 68 dB

D B 72 dB