18"

A B 68 dB

A A 69 dB

D E 71 dB

B A 71 dB

B B 67 dB

C A 70 dB

C C 72 dB

D B 70 dB

C A 70 dB

B C 71 dB

B A 70 dB

A A 68 dB

D B 71 dB

C A 72 dB

C D 72 dB

C C 72 dB

C B 71 dB

D E 73 dB

D A 72 dB

C A 72 dB

C A 72 dB

C A 72 dB