18"

C B 72 dB

C A 72 dB

B A 71 dB

A A 71 dB

D B 71 dB

A A 70 dB

C C 73 dB

D A 71 dB

A A 69 dB

B B 69 dB

B B 69 dB

C A 71 dB

C A 72 dB

A A 68 dB

D B 71 dB

A B 70 dB

B B 70 dB

A A 69 dB

D C 72 dB

A A 68 dB

C E 72 dB

C C 72 dB

D B 72 dB

C B 71 dB