18"

C E 72 dB

C A 72 dB

C A 71 dB

C A 70 dB

B B 73 dB

B B 69 dB

A B 69 dB

C D 72 dB

C A 72 dB

B A 70 dB

D B 73 dB

E C 72 dB

B B 71 dB

B B 72 dB

B A 71 dB

C D 72 dB

C A 73 dB

B A 70 dB

C D 71 dB

C A 70 dB