18"

C A 72 dB

C A 71 dB

C B 71 dB

C B 71 dB

C B 69 dB

D B 70 dB

C B 68 dB

B A 71 dB

C C 71 dB

B A 71 dB

A B 72 dB

D B 70 dB

A B 71 dB

A A 69 dB

B B 72 dB

D E 72 dB

C A 72 dB

D B 70 dB

B B 71 dB

B E 70 dB

B B 69 dB

A A 72 dB